Fideism

Fideism: the error that declares reason powerless before God, condemned at Strasbourg in 1840, at Paris in 1855, defined against at Vatican I in 1870 and denounced again by John Paul II in 1998.

Ignispedia

Fideism is the error according to which human reason could know nothing of God by itself: neither his existence, nor the immortality of the soul, nor the foundations of metaphysics, with only faith, received as a blind gift, counting for anything[1]. Born in nineteenth-century Catholic France as a panicked reaction to the rationalism of the Enlightenment, it was condemned by the Holy See three times, with propositions imposed on Louis Bautain in 1840 and 1844, then on Augustin Bonnetty in 1855, before the First Vatican Council solemnly defined the opposite in 1870: God can be known with certainty by reason, and faith is never without reason[2].

From the Catholic point of view, fideism is a modern heresy in the precise sense of the word: not a refusal to believe too little, but a refusal to think, a distrust of the natural capacities of reason which ends up making faith itself indefensible, since one can no longer show an unbeliever why he should believe[3]. A century later, John Paul II took up the warning in Fides et Ratio (1998): there he denounces a "resurgence of fideism" even in contemporary theology, in the form of biblicism and contempt for philosophy[4].

This article treats nineteenth-century Catholic fideism and its condemnation: the exact definition, the traditionalist root, the two cases (Bautain, Bonnetty), the answer of Vatican I and the 1998 rereading. The doctrine of philosophical traditionalism, of which fideism is the heir, belongs to the article Philosophical Traditionalism; the Protestant question of sola fide to the articles Lutheranism and Calvinism; related modern errors to the articles Modernism and Doctrinal Relativism: the reader is referred there instead of duplicating the material[5].

What is fideism?

The word and the thing

The word comes from the Latin fides, faith, with the suffix -ism designating here an exaggeration: making faith everything, and reason nothing[6]. The fideist does not deny God; on the contrary, he wants to protect him from the attacks of rationalist philosophy by placing him beyond the reach of all discussion. But by declaring reason incompetent in divine matters, he obtains the opposite of what he seeks: a faith which can be neither explained, nor defended, nor proposed to whoever does not already have it[7].

"Reason, left to itself, can prove nothing of the fundamental truths: it is faith alone which gives access to God." — Summary of the fideist thesis, from the condemned propositions[8]

The error in one sentence

To grasp what is at stake, a simple image: faith and reason are like two wings of the same bird, the image is John Paul II's at the threshold of Fides et Ratio[9]. Rationalism wants to fly with the single wing of reason; fideism, with the single wing of faith. In both cases the bird flies in circles and crashes: a reason without faith believes itself all-powerful and ends up denying mystery; a faith without reason believes itself very pure and ends up unable to say why it believes[10].

What fideism is not

Three frequent confusions, to be set aside from the start[11]:

  • Believing without understanding everything is not fideism. Every Catholic believes mysteries which surpass reason: the Trinity, the Incarnation, the Real Presence. Fideism does not consist in believing mysteries, but in affirming that reason can establish nothing, not even the existence of God[12].
  • Preferring faith to philosophy is not fideism. Pascal, Newman and many saints exalted faith above systems: they never denied that reason can demonstrate the existence of God[13].
  • The Protestant sola fide is not fideism. Luther and Calvin affirm that man is saved by faith alone, without works: that is a thesis on justification, condemned on other grounds, but distinct from the fideist thesis on the powerlessness of reason[14]. See the articles Lutheranism and Calvinism.

Where fideism comes from: a frightened nineteenth-century Catholicism

Traditionalism, the root of fideism

Fideism does not come from nowhere: it is the late and radicalized fruit of philosophical traditionalism, the system which, after the Revolution, made Revelation transmitted by tradition the unique source of all certainty, including truths which natural reason can attain[15]. Lamennais and his disciples had thus wanted to answer the Enlightenment by turning its weapon around: since individual reason produced the Revolution, they said, only the authority of universal tradition guarantees truth[16]. Fideism takes up this distrust and pushes it to the limit: not only is individual reason fallible, but it is radically powerless in religious matters[17]. The history and detailed refutation of this system belong to the article Philosophical Traditionalism; only what sheds light on the two condemnations is kept here[18].

Chronology of the facts

DateEventScope
1830Bonnetty founds the Annales de philosophie chrétienneForum of fideist traditionalism
18 November 1835Six first propositions imposed on BautainFirst Roman warning
8 September 1840Six new propositions imposed on Bautain (DS 2751-2756)Condemnation of Bautainian fideism
26 April 1844Promise imposed on Bautain (DS 2765-2769)He gives up teaching the powerlessness of reason
11 June 1855Four propositions imposed on Bonnetty (DS 2811-2814)Condemnation of Bonnettyst fideism
24 April 1870Vatican I, constitution Dei FiliusSolemn definition: God knowable by reason
14 September 1998John Paul II, Fides et Ratio, §§ 52 and 55Warning against the resurgence of fideism

Louis Bautain: the Strasbourg professor summoned to submit

A philosopher turned priest

Louis Bautain, De l'enseignement de la philosophie en France, 1833. Columbia University Libraries copy, digitized by the Internet Archive, via Wikimedia Commons, public domain.

Louis-Eugène-Marie Bautain (1796-1867) was first a brilliant academic: professor of philosophy at Strasbourg from 1816, he went through a deep intellectual crisis before the powerlessness of systems, with both the sensualism of Condillac and the eclecticism of Victor Cousin seeming to him incapable of founding certainty[19]. Ordained a priest in 1828, he kept his chair and taught there a philosophy wholly turned toward faith: having so often seen reason go astray, he ended up declaring it blind[20]. His teaching drew crowds of students, but worried his bishop: can Catholic youth be formed by teaching them that their reason proves nothing?[21]

The Bautainian system

Bautain's reasoning starts from a correct observation, that reason wounded by sin often goes astray, to draw a false conclusion from it: the fundamental truths (God, the soul, morality) would be inaccessible to reason left to itself and could be known only by faith, received in an interior experience[22]. Philosophy would then serve only to prepare the heart, never to demonstrate: faced with an atheist, the Catholic would have no rational argument to offer, only the witness of his faith[23]. That is exactly the opposite of the tradition of the Church, which always held that the existence of God can be proved: Saint Paul affirms it (Rom 1:19-20), and Vatican I would define it[24].

Three Roman acts: 1835, 1840, 1844

Rome proceeds by stages, with remarkable patience[25]. First act, 18 November 1835: after examination of his teaching, Bautain must sign six propositions recalling Catholic doctrine on faith and reason[26]. Second act: the Roman examination of his Philosophie du christianisme (Paris, 1835) shows that the error persists; on 8 September 1840, he signs six new propositions, "differing but slightly" from the first[27]. The first two and the fifth say the essential:

"Human reason is able to prove with certitude the existence of God; faith, a heavenly gift, is posterior to revelation, and therefore cannot properly be used against the atheist to prove the existence of God." — First proposition imposed on Bautain, 8 September 1840 (Ignispedia translation)[28]

"The use of reason precedes faith and, with the help of revelation and grace, leads to it." — Fifth proposition imposed on Bautain, 8 September 1840 (Ignispedia translation)[29]

These texts are referenced DS 2751-2756 in Denzinger, the official collection of magisterial definitions[30]. Third act, 26 April 1844: in obedience to the Congregation of Bishops and Regulars, Bautain promises never again to teach that the existence of God, the spirituality and immortality of the soul, the principles of metaphysics and the motives which make Revelation credible would be beyond the reach of unaided reason (DS 2765-2769)[31]. He kept his word: vicar general of Paris in 1849, professor of moral theology at the Sorbonne in 1853, he died in 1867 reconciled, an esteemed preacher[32].

Augustin Bonnetty and the Annales de philosophie chrétienne

A review at the service of tradition

Augustin Bonnetty (1798-1879) founds in 1830 the Annales de philosophie chrétienne, a review meant to show the agreement of science and religion, an excellent project in itself[33]. But to defend religion against the surrounding rationalism, the review slides down the same slope as Bautain: by dint of wanting to owe everything to Revelation, it ends up refusing to reason unenlightened by faith any capacity to prove God, the spiritual soul and human freedom[34]. The reasoning meant to be protective: if reason can do nothing without faith, then rationalist attacks cannot reach it. In reality, it surrendered everything: a faith which no reason supports can be proposed to no one[35].

The four propositions of 11 June 1855

On 11 June 1855, the Congregation of the Index requires Bonnetty to sign four propositions (DS 2811-2814) which re-establish the distinction, and the harmony, of faith and reason, while clearing scholasticism of the suspicion of rationalism[36]. In them Bonnetty now admits, contrary to his earlier doctrine, that the existence of God, the spirituality of the human soul and the freedom of man can be proved with certainty by reason[37]. The formula is clear:

"The existence of God, the spirituality of the soul and the freedom of man can be proved with certainty by natural reason." — Substance of the propositions imposed on Bonnetty, 11 June 1855 (Ignispedia translation)[38]

Annales de philosophie chrétienne, volume IX, 1834. Harvard University copy, digitized by Google Books, via Wikimedia Commons, public domain.

Bonnetty signs and continues publishing his Annales until his death, in obedience[39]. The case marks the end of militant fideism in France: fifteen years later, the First Vatican Council would give these disciplinary propositions the force of a universal dogmatic definition[40].

What the Church defined: Vatican I, Dei Filius (1870)

God can be known by reason: chapter II

On 24 April 1870, the First Vatican Council promulgates the dogmatic constitution Dei Filius on the Catholic faith, the first text of an ecumenical council devoted organically to the relations of faith and reason[41]. Its chapter II defines that God, the principle and end of all things, can be known with certainty by the natural light of human reason through created things (DS 3004)[42]. The council relies on Scripture itself:

"Because that which is known of God is manifest in them, for God hath manifested it unto them. For the invisible things of him, from the creation of the world, are clearly seen, being understood by the things that are made: his eternal power also and divinity." — Saint Paul, Romans 1:19-20[43]

"But all men are vain, in whom there is not the knowledge of God, and who by these good things that are seen could not understand him that is, neither by attending to the works have acknowledged who was the workman." — Book of Wisdom, 13:1[44]

In other words: the pagan who contemplates the world can rise back up to God, and if he does not, he is without excuse. That is the direct condemnation of fideism: to declare reason powerless is to contradict Saint Paul[45].

Never any disagreement between faith and reason: chapter IV

Chapter IV draws the consequences (DS 3015): there is a twofold order of knowledge, distinct in its principle, reason and faith, but bearing on the same truth, which cannot contradict itself since God is the author of both[46]. The Latin text is a summit of Catholic theology:

"Not only can faith and reason never be at odds with one another, but they render mutual help to each other: right reason demonstrates the foundations of faith, and, enlightened by its light, cultivates the science of divine things; faith, for its part, frees reason from errors, protects it and enriches it with manifold knowledge." — First Vatican Council, Dei Filius, ch. IV (Ignispedia translation)[47]

The council adds (DS 3017) that this harmony is not optional: the Church, "far from opposing the cultivation of the human arts and sciences, helps and promotes it in many ways"[48]. Fideism, which despises reason in the name of faith, is therefore doubly condemned: it is mistaken about reason and it disobeys the missionary impulse of the Church toward intelligence[49].

The canons: the anathema

As usual, the council accompanies its doctrine with canons striking contrary errors with anathema[50]. Canon 2 on Revelation (DS 3026) condemns whoever denies that God can be known by natural reason[51]. The table summarizes the edifice:

TextContentReference
Dei Filius, ch. IIGod knowable with certainty by reasonDS 3004
Dei Filius, ch. IVNever any real disagreement between faith and reason; mutual helpDS 3015
Dei Filius, ch. IVThe Church favours the human sciencesDS 3017
Canon 2, § 1Anathema against the denial of the natural knowledge of GodDS 3026
Bautain propositions 1840Reason proves God; reason precedes faithDS 2751-2756
Bautain promise 1844Renunciation of the powerlessness of reasonDS 2765-2769
Bonnetty propositions 1855God, the soul, freedom provable with certaintyDS 2811-2814

What Vatican II confirmed

A century later, the Second Vatican Council takes up the doctrine without changing anything in it: Dei Verbum teaches that man can know God by reason (§ 6) and that faith is the free obedience of the intelligence to Revelation (§ 5)[52]; Gaudium et Spes quotes Dei Filius to affirm the rightful autonomy of reason and the sciences (§ 59)[53]. The continuity is total: on faith and reason, the Church says the same thing in 1840, in 1870, in 1965 and in 1998[54].

Why fideism is a grave error

A faith which can no longer be proposed to anyone

The first effect of fideism is missionary, and disastrous: if reason proves nothing, apologetics becomes impossible[55]. Faced with an atheist who asks "why do you believe?", the fideist can only answer "believe first, you will understand afterwards", that is, demand precisely what is in question[56]. Yet the Church always did the opposite: Saint Peter orders us to be "always ready to give an answer in defence of our hope" to whoever asks (1 Pet 3:15)[57], and the Catechism recalls that miracles, prophecies and the holiness of the Church are motives of credibility, signs that faith is not a leap into the void[58]:

"That the submission of our faith might be in accordance with reason, it pleased God that with the interior helps of the Holy Spirit there should be joined exterior proofs of his revelation." — First Vatican Council, Dei Filius, ch. III (Ignispedia translation)[59]

A faith which can no longer be defended against error

The second effect is doctrinal: a faith without reason is defenceless against false mysticisms and sects[60]. If no rational check applies to religion, then all "interior experiences" are equal, and the disarmed Catholic can no longer distinguish Revelation from illuminisms[61]. That is why the Catechism specifies that faith is certain, more certain than all human knowledge, precisely because it rests on the authority of God himself who reveals, not on a blind feeling[62]:

"Faith is certain, more certain than all human knowledge, because it is founded on the very word of God, who cannot lie." — Catechism of the Catholic Church, § 157[63]

Three positions face to face

PositionThesisJudgment of the Church
RationalismReason suffices for everything; mystery is absurdCondemned (with fideism, Fides et Ratio § 52)
FideismReason proves nothing; only faith countsCondemned (1840, 1844, 1855, 1870, 1998)
Catholic doctrineTwofold order of knowledge; mutual help of faith and reasonDefined (Dei Filius, CCC 156-159)

Does fideism exist among Protestants?

Sola fide is not fideism

The question is often asked, and the answer must be clear: the sola fide of the Reformation is not fideism[64]. When Luther affirms that man is justified by faith alone, he speaks of the means of salvation, not of the power of reason. A Lutheran can perfectly admit the rational proofs of the existence of God while upholding sola fide; conversely, a nineteenth-century Catholic fideist rejected the proofs while remaining Catholic on justification[65]. The two errors sometimes accumulate in the same author, but they never merge[66]. For the Protestant doctrine of justification, see the articles Lutheranism and Calvinism.

Kierkegaard and Barth: Protestant forms of fideism?

On the other hand, certain later Protestant theologies do fall under fideism in the Catholic sense of the term[67]. Soren Kierkegaard (1813-1855) makes the "leap of faith" a paradox inaccessible to all reason, with Abraham climbing Mount Moriah believing "by virtue of the absurd"[68]. Karl Barth (1886-1968) digs an infinite gulf between God, "wholly Other", and all natural knowledge, refusing the praeambula fidei of Catholic theology[69]. The Church sees in this the same error as at Strasbourg in 1840: to cut faith off from reason is to make it unintelligible to the world it must save[70]. These developments belong to the history of Protestantism, however: they are pointed out here without being treated, so as not to encroach on the neighbouring articles[71].

Fides et Ratio: the 1998 warning

Paragraph 52: the parallel censure

On 14 September 1998, John Paul II publishes the encyclical Fides et Ratio on the relations of faith and reason, the first great magisterial text on the subject since Vatican I[72]. Its chapter V recounts the history of Roman interventions, and paragraph 52 names the error by its name:

"Thus there was a parallel censure: on the one hand, fideism and radical traditionalism, for their distrust of the natural capacities of reason; on the other hand, rationalism and ontologism, since they attributed to natural reason what can be known only in the light of faith." — John Paul II, Fides et Ratio, § 52 (Ignispedia translation)[73]

The formula is remarkable: fideism is condemned with its opposite, in the same movement, the two symmetrical excesses which break the unity of truth[74]. And it is in the notes to this paragraph that the encyclical gives the exact references of the nineteenth-century censures: Bautain 1840 (DS 2751-2756), Bautain 1844 (DS 2765-2769), Bonnetty 1855 (DS 2811-2814)[75]. In other words: in 1998, Rome endorses the whole chain, 1840, 1855, 1870, as a single continuous teaching[76].

Paragraph 55: the fideism of today

But the encyclical does not only do history: it diagnoses the present. Paragraph 55 warns against "dangers of a resurgence of fideism" in contemporary theology itself[77]:

"We must also consider the dangers of a resurgence of fideism, which fails to recognize the importance of rational knowledge and philosophical discourse for the understanding of faith, indeed for the very possibility of belief in God." — John Paul II, Fides et Ratio, § 55 (Ignispedia translation)[78]

John Paul II names two present forms[79]. First "biblicism", which makes the reading of Scripture "the sole true point of reference", to the contempt of Tradition and of the magisterium confirmed by Vatican II[80]. Then "latent fideism": the little account taken of speculative theology, the contempt for classical philosophy from which the dogmatic formulations themselves drew their vocabulary[81]. Every Catholic who neglects Saint Thomas in the name of a "purer" faith should reread these lines: contempt for reason is never progress for faith[82].

Faith and reason: the Catholic position in practice

The twofold order of knowledge

To fix ideas simply: God can be known in two ways, which neither oppose nor repeat each other[83]. By reason, every man can reach certain truths, that God exists, that he is one, that the soul is spiritual, starting from the created world: these are called the preambles of faith[84]. By faith, man receives in addition what no reason would ever have discovered alone: the Trinity, the Incarnation, the Redemption, the mysteries properly so called[85]. Reason prepares, accompanies and defends; faith elevates, purifies and completes[86].

What this changes in practice

This doctrine is not a luxury for theologians: it governs the whole missionary life of the Church[87]. It is because reason can do something that apologetics makes sense, that one can discuss with an atheist, answer Protestant objections (see the article Doctrinal Relativism for contemporary forms of the refusal of truth), and teach the faith to children with reasons suited to their age[88]. It is because faith surpasses reason that theology remains a wisdom, not a mere religious philosophy: it contemplates mysteries, it does not manufacture them[89]. And it is because both serve the same truth that the Catholic never has to choose between being intelligent and being a believer: the most mystical saints, Thomas Aquinas, Teresa of Avila, John of the Cross, were also minds of formidable rigour[90].

To go further

The reader who wants to go deeper will start with the texts themselves: the constitution Dei Filius of Vatican I (24 April 1870) and the encyclical Fides et Ratio of John Paul II (14 September 1998), both accessible on vatican.va, then paragraphs 156 to 159 of the Catechism of the Catholic Church on the motives for believing[91]. For the traditionalist root from which fideism comes, see the article Philosophical Traditionalism; for the modern errors which are its cousins, the modernism condemned by Pascendi and liberal Catholicism, see the articles Modernism and Condemned Liberal Catholicism[92].

Notes and References

  1. J. Forget, "Fideism", The Catholic Encyclopedia, vol. 6, New York, Robert Appleton, 1909: fideism denying reason any power to demonstrate God and the fundamental truths (Ignispedia translation).

    1
  2. First Vatican Council, dogmatic constitution Dei Filius, 24 April 1870, ch. II (DS 3004) and ch. IV (DS 3015).

    2
  3. John Paul II, Fides et Ratio, § 55: fideism "fails to recognize the importance of rational knowledge [...] indeed for the very possibility of belief in God" (Ignispedia translation).

    3
  4. John Paul II, Fides et Ratio, 14 September 1998, §§ 52 and 55.

    4
  5. Neighbouring Ignispedia articles: Philosophical Traditionalism (in progress, traditionalist root); Lutheranism and Calvinism (PUBLISHED, sola fide); Modernism and Doctrinal Relativism (in progress, modern errors). The present article takes from them only the necessary minimum.

    5
  6. Latin fides (faith, trust, fidelity), cf. CCC 150-152 on faith as personal adherence and assent.

    6
  7. J. Forget, "Fideism", quoted: by denying reason all access to God, fideism makes faith undemonstrable to whoever does not possess it (Ignispedia translation).

    7
  8. Ignispedia summary established from the condemned theses: Bautain propositions 1840 (DS 2751-2756) and Bonnetty propositions 1855 (DS 2811-2814).

    8
  9. John Paul II, Fides et Ratio, introduction: "Faith and reason are like two wings on which the human spirit rises to the contemplation of truth."

    9
  10. John Paul II, Fides et Ratio, §§ 45-48: the "drama of the separation of faith and reason" and its two symmetrical excesses (Ignispedia translation).

    10
  11. Distinctions recalled by J. Forget, "Fideism", quoted, and by constant doctrine (Dei Filius, CCC).

    11
  12. Dei Filius, ch. IV (DS 3016): there are mysteries hidden in God "which cannot be known unless they are divinely revealed", which fideism confuses with the total powerlessness of reason (Ignispedia translation).

    12
  13. Pascal (Pensées), Newman (Grammar of Assent, 1870): existential primacy of faith without denial of the proofs, the exact opposite of the thesis condemned in 1840.

    13
  14. Council of Trent, decree on justification, 13 January 1547 (DS 1520-1583): the sola fide question is settled on another ground than fideism.

    14
  15. John Paul II, Fides et Ratio, § 52: "fideism and radical traditionalism" censured together "for their distrust of the natural capacities of reason" (Ignispedia translation).

    15
  16. F. de Lamennais, Essai sur l’indifférence en matière de religion, Paris, 1817-1823: certainty founded on the authority of universal testimony against individual reason.

    16
  17. J. Forget, "Fideism", quoted: Bautain and Bonnetty carry traditionalist distrust of reason as far as the denial of all rational proof (Ignispedia translation).

    17
  18. Ignispedia article Philosophical Traditionalism (in progress in another run, simply linked): Lamennais, Bautain and Bonnetty as traditionalists, the sensus communis, the condemnation. The present article takes from it only the filiation useful to fideism.

    18
  19. "Louis Eugène Marie Bautain" notice (cross-checked): born in Paris on 17 February 1796, professor of philosophy at Strasbourg from 1816, died at Viroflay on 15 October 1867.

    19
  20. J. Forget, "Louis-Eugène-Marie Bautain", The Catholic Encyclopedia, vol. 2, 1907: ordained a priest at Strasbourg in 1828, he kept his chair of philosophy.

    20
  21. J. Forget, "Louis-Eugène-Marie Bautain", quoted: teaching followed with enthusiasm by youth, but suspected by diocesan authority (Ignispedia translation).

    21
  22. J. Forget, "Fideism", quoted: according to Bautain, the fundamental truths are beyond the reach of reason left to itself and are known only by faith (Ignispedia translation).

    22
  23. J. Forget, "Fideism", quoted, prop. no. 1 of 1840: "faith [...] cannot properly be used against the atheist to prove the existence of God".

    23
  24. Rom 1:19-20, quoted by Dei Filius, ch. II (DS 3004): the natural knowledge of God through creatures.

    24
  25. Three interventions in nine years (1835, 1840, 1844), all followed by submissions: the gradual disciplinary method of the Holy See in the nineteenth century.

    25
  26. J. Forget, "Louis-Eugène-Marie Bautain", quoted: "He was consequently obliged to sign (18 November, 1835) six propositions containing the Catholic doctrine on faith and reason".

    26
  27. J. Forget, "Louis-Eugène-Marie Bautain", quoted: "After the examination at Rome of his work, Philosophie du christianisme (Paris, 1835), Bautain signed (8 September, 1840) six other propositions differing but slightly from those of 1835".

    27
  28. J. Forget, "Fideism", quoted: "Human reason is able to prove with certitude the existence of God; faith, a heavenly gift, is posterior to revelation, and therefore cannot be properly used against the atheist to prove the existence of God".

    28
  29. J. Forget, "Fideism", quoted: "The use of reason precedes faith and, with the help of revelation and grace, leads to it".

    29
  30. John Paul II, Fides et Ratio, note 59: "Theses a Ludovico Eugenio Bautain iussu sui Episcopi subscriptae (8 September 1840): DS 2751-2756".

    30
  31. John Paul II, Fides et Ratio, note 59: "Theses a Ludovico Eugenio Bautain ex mandato S. Congr. Episcoporum et Religiosorum subscriptae (26 April 1844): DS 2765-2769"; J. Forget, "Louis-Eugène-Marie Bautain", quoted: promise no longer to teach the powerlessness of reason on God, the soul, metaphysics and the motives of credibility (Ignispedia translation).

    31
  32. Cross-checked notice: vicar general of the diocese of Paris in 1849, professor of moral theology at the Sorbonne in 1853, reputation as a preacher.

    32
  33. "Augustin Bonnetty" notice (cross-checked, Encyclopedia.com): born in 1798, died in 1879, founder of the Annales de philosophie chrétienne in 1830.

    33
  34. J. Forget, "Fideism", quoted: Bonnetty refuses reason the certain proof of God, of the spiritual soul and of freedom (Ignispedia translation).

    34
  35. Ignispedia analysis in line with Dei Filius, ch. III on the motives of credibility (DS 3009): faith has exterior signs that can be proposed to reason.

    35
  36. Encyclopedia.com, "Bonnetty, Augustin": "on June 11, 1855 the Congregation of the Index insisted that Bonnetty subscribe to four propositions (H. Denzinger, Enchiridion symbolorum, Freiburg, 1963, 2811-14)"; John Paul II, Fides et Ratio, note 60: "Decretum Theses contra traditionalismum Augustini Bonnetty (11 June 1855): DS 2811-2814".

    36
  37. J. Forget, "Fideism", quoted: Bonnetty "signed theses reversing his previous doctrine by admitting that God's existence, the spirituality of the human soul, and man's liberty can be proved with certainty (Denzinger, 2812, cf. 2811, 2813-14)".

    37
  38. Substance of the four propositions of 11 June 1855, from J. Forget, "Fideism", quoted (Ignispedia translation).

    38
  39. Encyclopedia.com, "Bonnetty, Augustin", quoted: upholding the distinction but also the harmony of faith and reason after the signature (Ignispedia translation).

    39
  40. Fifteen years separate the Bonnetty decree (1855) from Dei Filius (1870), which raises the doctrine of the propositions to dogmatic rank.

    40
  41. John Paul II, Fides et Ratio, § 52: "The positive content of this debate was given organic exposition in the dogmatic constitution Dei Filius, by which, for the first time, an ecumenical Council [...] intervened solemnly on the relations between reason and faith" (Ignispedia translation).

    41
  42. First Vatican Council, Dei Filius, ch. II (DS 3004): "God, the principle and end of all things, can be known with certainty by the natural light of human reason through created things" (Ignispedia translation).

    42
  43. Current English rendering of Rom 1:19-20 (Douay-Rheims), the text invoked by Dei Filius, ch. II.

    43
  44. Current English rendering of Wis 13:1 (Douay-Rheims), in line with Dei Filius, ch. II.

    44
  45. Ignispedia commentary in line with Dei Filius, ch. II and canon 2, § 1 (DS 3026).

    45
  46. First Vatican Council, Dei Filius, ch. IV (DS 3015): the twofold order of knowledge.

    46
  47. First Vatican Council, Dei Filius, ch. IV: "Neque solum fides et ratio inter se dissidere nunquam possunt, sed opem quoque sibi mutuam ferunt, cum recta ratio fidei fundamenta demonstret, eiusque lumine illustrata rerum divinarum scientiam excolat; fides vero rationem ab erroribus liberet ac tueatur, eamque multiplici cognitione instruat." (Latin text, vatican.va; Ignispedia translation in the body).

    47
  48. First Vatican Council, Dei Filius, ch. IV (DS 3017): "far from opposing the cultivation of the human arts and sciences, [the Church] helps and promotes it in many ways" (Ignispedia translation).

    48
  49. Ignispedia commentary in line with Dei Filius, ch. IV (DS 3015-3017).

    49
  50. Dei Filius closes with canons on the Catholic faith, including canon 2 on Revelation.

    50
  51. John Paul II, Fides et Ratio, note 63: "Canon 2, 1: DS 3026".

    51
  52. Second Vatican Council, dogmatic constitution Dei Verbum, §§ 5-6, 18 November 1965.

    52
  53. Second Vatican Council, pastoral constitution Gaudium et Spes, § 59, 7 December 1965, quoting Dei Filius, ch. IV (DS 3015), cf. John Paul II, Fides et Ratio, note 64.

    53
  54. Ignispedia synthesis: propositions of 1840-1855, Dei Filius (1870), Vatican II (1965), Fides et Ratio (1998), a single continuous teaching.

    54
  55. 1 Pet 3:15 and Dei Filius, ch. III (DS 3009): the motives of credibility make the homage of faith "in accordance with reason".

    55
  56. Logical consequence of prop. no. 1 of 1840: if faith is posterior and intransmissible by proof, it cannot serve as an argument against the atheist.

    56
  57. Current English rendering of 1 Pet 3:15 (Douay-Rheims): "being ready always to satisfy every one that asketh you a reason of that hope which is in you."

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  58. CCC 156: miracles, prophecies, the spread and holiness of the Church as "sure signs of revelation, adapted to the intelligence of all" (Ignispedia translation).

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  59. First Vatican Council, Dei Filius, ch. III (DS 3009): "ut fidei nostrae obsequium rationi consentaneum esset, voluit Deus cum internis Spiritus Sancti auxiliis externa iungi revelationis suae argumenta" (Ignispedia translation in the body).

    59
  60. Doctrinal consequence noted by J. Forget, "Fideism", quoted: without a rational criterion, interior experience becomes the sole judge (Ignispedia translation).

    60
  61. Cf. 1 Jn 4:1 ("test the spirits") and the tradition of discernment: reason enlightened by faith distinguishes Revelation from illuminisms.

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  62. CCC 157: faith as certainty founded on God who reveals.

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  63. Faithful paraphrase of CCC 157: "Faith is certain, more certain than all human knowledge, because it is founded on the very word of God who cannot lie."

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  64. Classical distinction: sola fide concerns justification (how man is saved), fideism concerns knowledge (what reason can prove).

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  65. On the Protestant doctrine of justification, see the Ignispedia articles Lutheranism and Calvinism.

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  66. Ignispedia methodological remark: two distinct errors can coexist in the same author without merging, hence cross-references rather than merging the articles.

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  67. Constant Catholic position since Dei Filius: any theology denying the praeambula fidei falls materially under fideism, whatever its confession of origin.

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  68. S. Kierkegaard, Fear and Trembling, Copenhagen, 1843: Abraham and the "knight of faith" beyond all rational mediation.

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  69. K. Barth, Epistle to the Romans, Bern, 1919, then Church Dogmatics: God "wholly Other" (totaliter aliter), refusal of a natural theology.

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  70. Judgment based on the criterion of Dei Filius, ch. II-IV: the denial of the natural knowledge of God is condemned independently of its author.

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  71. Ignispedia articles Lutheranism and Calvinism (PUBLISHED): justification, Reformation, later theologies. The present article takes from them only the useful distinction.

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  72. John Paul II, Fides et Ratio, 14 September 1998: the first encyclical devoted to the relations of faith and reason since Aeterni Patris of Leo XIII (1879).

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  73. John Paul II, Fides et Ratio, § 52 (French text, vatican.va, consulted 5 October 2026; Ignispedia translation into English).

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  74. Ignispedia commentary on the structure of § 52: parallel double censure of the two symmetrical excesses.

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  75. John Paul II, Fides et Ratio, notes 59-60: DS references of the Bautain and Bonnetty censures.

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  76. Ignispedia synthesis: by referring to DS 2751-2756, 2765-2769 and 2811-2814 in its notes 59-60, Fides et Ratio endorses the disciplinary then dogmatic continuity.

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  77. John Paul II, Fides et Ratio, § 55, first paragraph: "the temptations of the past reappear" (Ignispedia translation).

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  78. John Paul II, Fides et Ratio, § 55 (French text, vatican.va, consulted 5 October 2026; Ignispedia translation into English).

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  79. John Paul II, Fides et Ratio, § 55: "biblicism" then the "other forms of latent fideism" (Ignispedia translation).

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  80. John Paul II, Fides et Ratio, § 55: biblicism "tends to make the reading of Sacred Scripture or its exegesis the sole true point of reference", making vain "[...] the doctrine of the Church which the Second Vatican Ecumenical Council expressly confirmed" (Ignispedia translation).

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  81. John Paul II, Fides et Ratio, § 55: "Other forms of latent fideism can be recognized in the scant consideration given to speculative theology, as also in contempt for classical philosophy", with the reminder of the warning of Pius XII (Humani generis, 1950) (Ignispedia translation).

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  82. Ignispedia application of § 55 to ordinary Catholic intellectual life.

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  83. Simplified exposition in line with Dei Filius, ch. IV (DS 3015) and CCC 159 ("faith and science").

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  84. Praeambula fidei: truths accessible to reason and presupposed by faith, the existence of God, the spirituality of the soul. Cf. CCC 156.

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  85. Dei Filius, ch. IV (DS 3016): mysteries "hidden in God" which reason left to itself could not discover.

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  86. Formula summarizing Dei Filius, ch. IV: "opem sibi mutuam ferunt", they render mutual help to each other.

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  87. Missionary consequence drawn from 1 Pet 3:15 and Dei Filius, ch. III.

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  88. Reference to the Ignispedia article Doctrinal Relativism (in progress) for contemporary forms of the refusal of objective truth.

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  89. John Paul II, Fides et Ratio, § 77: theology as the understanding of Revelation, not as a rational construction.

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  90. Examples: Saint Thomas Aquinas (1225-1274), Saint Teresa of Avila (1515-1582), Saint John of the Cross (1542-1591), doctors whose mysticism never weakened their rigour.

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  91. Complete texts: Dei Filius and Fides et Ratio on vatican.va; CCC 156-159.

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  92. Ignispedia articles Philosophical Traditionalism, Modernism, Condemned Liberal Catholicism, the last in progress in another run, simply linked.

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