Why Believe in the Perpetual Virginity of Mary?

Before discussing, one must know what is being talked about. The perpetual virginity of Mary is not a vague intuition: it is a precise affirmation, which unfolds in three moments.

The Three Moments: Before, During, After

Tradition has always distinguished three aspects, summarized by three Latin expressions:

• Before childbirth (ante partum): Mary conceives Jesus virginally, by the operation of the Holy Spirit, without the cooperation of a man. This is the virginal conception, attested by Matthew and Luke^[1] and confessed in the Creed.
• During childbirth (in partu): Mary gives birth without losing her virginal integrity. The Synod of the Lateran says the birth of Christ left “her virginity intact”^[2]. The Catechism uses an ancient formula: the birth of Jesus “did not diminish but rather consecrated the virginal integrity” of His mother^[3].
• After childbirth (post partum): Mary never knows marital union and has no other children. Jesus is “the only Son of Mary”^[4].

“The deepening of faith in the virginal motherhood has led the Church to confess the real and perpetual virginity of Mary even in the birth of the Son of God made man.” — Catechism of the Catholic Church, § 499^[5]

It is this third point — virginity after birth — that is debated, because it is the one targeted by objections drawn from the “brothers of Jesus.” The first two are accepted by almost all Christians who profess the Creed.

What the Dogma Does Not Say

Three common misunderstandings must be dismissed at the outset, because they cause rejection of the dogma for the wrong reasons.

First, perpetual virginity is not a disdain for marriage or sexuality. The Church blesses and sanctifies marriage as a sacrament; it does not say that the conjugal life of Joseph and Mary would have been a “sin” they avoided. It simply observes that God willed, for the Mother of His Son, a total virginal consecration.

Second, this dogma is not to be confused with the Immaculate Conception. Many mix the two. The Immaculate Conception concerns Mary’s freedom from sin from her own conception; perpetual virginity concerns her bodily integrity and consecration. These are two distinct truths^[6].

Finally, the dogma does not rest on discomfort with the body. It is not about saying that marriage would “defile” Mary. It is about recognizing, in her virginity, a sign: that of a woman entirely given to God, whose womb bore only one child — and that child is God Himself.

Sometimes one hears: “It’s a late belief, added by the Church to exalt Mary.” History says exactly the opposite. Perpetual virginity is one of the oldest Marian convictions — much older than its contestation.

From the Church Fathers to the Councils

As early as the 2nd century, the Protoevangelium of James (circa 150) presents Mary as a consecrated virgin^[7]. In the 4th century, when a certain Helvidius argued in Rome that Mary had other children after Jesus, Saint Jerome responded in 383 with an entire treatise, Against Helvidius (De perpetua virginitate beatae Mariae), which became the classical reference^[8]. Helvidius’s position was then perceived as a novelty contrary to the received faith — not the other way around.

The Church later solemnly confessed this faith:

The Synod of the Lateran of 649, under Pope Martin I, states the most complete formula:

“If anyone does not confess [...] that the holy Mother of God, ever virgin and immaculate, Mary [...] gave birth without corruption, her virginity remaining intact even after childbirth, let him be anathema.” — Synod of the Lateran, 649, canon 3^[14]

“Ever Virgin”: A Very Ancient Liturgical Title

The Greek title aeiparthenos — “ever virgin” — is used by the Eastern liturgy long before the conciliar definitions. The Catechism simply notes: “‘Ever virgin’: the Church’s liturgy celebrates Mary under this title.”^[15] This is therefore not a thesis of armchair theologians: it is a prayer of the Church, sung by the Christian people of East and West since antiquity. A belief sung in the universal liturgy for fifteen centuries is hardly a recent invention.

The dogma does not fall from the sky: it is rooted in several converging indications from Scripture, which Tradition has read together.

“I Do Not Know Man” (Luke 1:34)

At the Annunciation, when the angel announces to Mary that she will bear a son, she responds with a strange objection:

“How can this be, since I do not know man?” — Gospel according to Saint Luke 1:34^[16]

The objection is surprising: Mary is betrothed to Joseph. A young betrothed woman who learns she will have a son normally has no reason to be astonished — marriage naturally leads to motherhood. Why then does she object that she “does not know man”? The traditional reading sees here the indication of a virginity project: Mary would already have resolved to remain a virgin, which makes her question coherent. Without such an intention, her response would be almost incomprehensible^[17].

The Typology of the Ark and the Closed Gate

The Old Testament provides figures that Tradition applies to Mary. The strongest is that of the sanctuary.

“This gate shall remain shut; it shall not be opened, and no one shall enter by it; for the Lord, the God of Israel, has entered by it; therefore it shall remain shut.” — Ezekiel 44:2^[18]

The Fathers read in this closed gate of the Temple, through which only God passes, an image of Mary’s womb: the place where God entered, and which remains sealed. Likewise, Mary is called the new Ark of the Covenant: the ancient Ark, which carried the presence of God, was sacred, inviolable, reserved for God alone^[19]. These images do not “prove” virginity in the sense of a demonstration; but they illuminate the profound fittingness: the womb that bore God made man remains consecrated to Him alone.

Mary Entrusted to John (John 19:26-27)

At the foot of the Cross, the dying Jesus entrusts His mother to the disciple John:

“When Jesus saw his mother and the disciple whom he loved standing nearby, he said to his mother, ‘Woman, behold your son.’ Then he said to the disciple, ‘Behold your mother.’ And from that hour the disciple took her into his own home.” — Gospel according to Saint John 19:26-27^[20]

This gesture is revealing. In the Jewish world, a dying son entrusted his widowed mother to his other sons, not to a stranger. If Jesus had blood brothers, entrusting Mary to John, a man outside the family, would have been a grave offense to the Law and to the brothers in question. That Jesus gives His mother to a disciple strongly suggests that He had no brothers to care for her: He was Mary’s only Son^[21].

This is where the question truly hinges. Three biblical passages are often cited against perpetual virginity. Let’s examine them one by one, honestly.

“The brothers and sisters of Jesus” (Mt 13:55)

The objection. The Gospels name “brothers” of Jesus — James, Joseph, Simon, Jude — and mention his “sisters” (Mt 13:55-56; Mk 6:3). If Jesus had brothers and sisters, then Mary must have had other children.

The answer rests on three points.

First point — language. In Aramaic and Hebrew, there is no distinct word for “cousin” or “nephew.” The term ah (“brother”) broadly designates close relatives: brothers, cousins, nephews, clan members. The Old Testament illustrates this: Lot is called Abraham’s “brother” though he is his nephew (Gn 13:8; 14:14)^[22]; Laban is said to be Jacob’s “brother” though he is his uncle (Gn 29:15). The Gospel writers, writing in Greek but thinking in Semitic terms, retained this “brothers” (adelphoi) in its broader sense.

Second point — the decisive internal clue. The Gospel itself defuses the objection. Two of the “brothers” named in Mt 13:55 — James and Joseph — are explicitly presented elsewhere as sons of another Mary:

“There were also many women there, watching from a distance; among them were Mary Magdalene, Mary the mother of James and Joseph, and the mother of the sons of Zebedee.” — Gospel according to Saint Matthew 27:56^[23]

This “Mary, mother of James and Joseph” is distinguished from Jesus’ mother; John mentions near the cross, according to the most common identification, “Mary, wife of Clopas,” a relative of the Virgin (Jn 19:25)^[24]. The “brothers” James and Joseph are therefore not sons of the Virgin Mary, but her close relatives. This is exactly what the Catechism confirms:

“James and Joseph, ‘brothers of Jesus,’ are the sons of a Mary who was a disciple of Christ, who is significantly called ‘the other Mary.’” — Catechism of the Catholic Church, § 500^[25]

Third point — an alternative tradition. An ancient Eastern tradition, reflected in the Protoevangelium of James, holds that these “brothers” were children from a previous marriage of Joseph, a widower of advanced age^[26]. Whether one accepts the explanation of cousins (Western, St. Jerome) or half-brothers through Joseph (Eastern), neither makes Mary their mother. Both preserve her virginity.

“He did not know her until she had borne a son” (Mt 1:25)

The objection. Matthew writes that Joseph “did not know her until she had borne a son” (Mt 1:25). Doesn’t this “until” imply that afterward, he did “know” her?

The answer. No — this is a misunderstanding of both the Greek and older French. The conjunction “until” (Greek heôs hou) affirms what is true up to a certain point, without saying anything about what follows. It does not imply a change afterward. Scripture shows this repeatedly:

• “Michal, daughter of Saul, had no children until the day of her death” (2 Sam 6:23)^[27] — obviously, she had none after her death either.
• Jesus promises: “I am with you [...] until the end of the age” (Mt 28:20)^[28] — he obviously does not cease to be with his own after the end of the age.

Matthew’s meaning is simply to emphasize the virginal conception: Joseph had no part in Jesus’ conception. The evangelist wants to protect the mystery of the virginal birth, not provide information about their marital life afterward. Remarkably, it was the Reformers — Calvin foremost — who stated this most clearly:

“No just and well-founded inference can be drawn from these words of the evangelist about what happened after the birth of Christ.” — John Calvin, Commentary on the Harmony of the Gospels, Mt 1:25^[29]

“Her firstborn son” (Lk 2:7)

The objection. Luke calls Jesus “her firstborn son” (Lk 2:7). Doesn’t “firstborn” imply a “second-born”?

The answer. No. In Jewish Law, “firstborn” (prôtotokos) is a legal and cultic term, not information about siblings. The firstborn is the one “who opens the mother’s womb” and who, for that reason, must be consecrated to the Lord and redeemed (Ex 13:2; Nb 3:12-13)^[30]. One is “firstborn” from the first child, whether or not there are others afterward. By calling Jesus “firstborn,” Luke highlights that he must be presented and consecrated in the Temple — which he immediately narrates (Lk 2:22-24) — not that he had brothers.

Here is, in summary, the three objections and their keys to interpretation:

A major argument is too often overlooked in the debate: perpetual virginity is not a late “Roman” doctrine. It was held by the entire ancient Christian world — and upheld by the earliest Protestants themselves.

The Fathers, Unanimous

Saint Jerome, refuting Helvidius, summarizes the common conviction of his time:

“You say that Mary did not remain a virgin; I claim even more: Joseph himself was a virgin because of Mary, so that from a virginal marriage a virginal son might be born.” — Saint Jerome, Against Helvidius, 383^[34]

Saint Augustine, Saint Ambrose, Saint Athanasius, Saint Cyril — all confess Mary as “ever virgin.”

Luther, Calvin, Zwingli

Here is the point that often puzzles contemporary objectors: the founders of the Reformation, who rejected many Catholic doctrines, all maintained the perpetual virginity of Mary.

“Christ, our Savior, was the real and natural fruit of Mary’s virginal womb [...]. This happened without the involvement of a man, and she remained a virgin after that.” — Martin Luther, Sermons on John, 1537-1539^[35]

Luther clarifies elsewhere that the word “brothers” here means “cousins,” “for Scripture and the Jews always call cousins brothers,” and that Mary “had no other children” besides Christ^[36]. Calvin, as we have seen, sets aside any contrary deduction from Mt 1:25; on Mt 13:55, he reproaches Helvidius for his “excessive ignorance” in concluding from the mention of the “brothers” that Mary must have had many sons^[37]. Ulrich Zwingli is equally clear:

“I firmly believe, according to the words of the Gospel, that Mary, pure virgin, gave birth to the Son of God for us and that she remained, in childbirth and after childbirth, forever a pure and intact virgin.” — Ulrich Zwingli^[38]

In other words: the denial of perpetual virginity is not even an original “Protestant” position. It is a modern interpretation, appearing long after the Reformation. The great Reformers, careful readers of the Bible, saw no contradiction with Scripture.

The fundamental question remains: beyond the controversy, why does this truth matter? It is not a Marian trophy to defend for its own sake; it says something about Christ and God.

First, Mary’s virginity is ordered to her Son, not to herself. Like her divine motherhood (see Mary, Mother of God), her virginity points to Jesus: the womb that bore the incarnate Word is wholly reserved for this unique work. Mary does not belong to an ordinary human plan; she is the woman of the one true God, entirely available to Him.

Next, her virginity is the sign of her total faith. The Catechism expresses it: Mary is virgin “because her virginity is the sign of her faith ‘which no doubt alters’ and of her undivided gift to the will of God”^[39]. Her bodily virginity manifests a deeper virginity: that of a heart undivided, given to God without reserve.

Saint Augustine sums up this mystery by presenting the virginity of Mary’s body as the sign of a deeper virginity: that of a heart wholly given to God, which nourishes Christ with her milk and gives Him to the world through her faith^[40].

Finally, Mary is model and figure of the Church: virgin and mother at once. The Church, like Mary, bears the children of God while preserving intact the faith she has received^[41]. Perpetual virginity is therefore not a devotional curiosity: it is a sign that unites the mystery of Christ, Mary’s faith, and the vocation of the entire Church.

To believe in Mary’s perpetual virginity is not to add one more belief out of excessive piety. It is to receive, with the Fathers, the councils, and even the Reformers, a truth the Church has always held — and to read into it, in subtlety, all that it wants to teach us about God who became flesh in a womb consecrated solely to Him.

• Why is Mary called Mother of God? — the other great Marian truth ordered to the mystery of Christ.
• Why is the Immaculate Conception logical? — not to be confused: Mary conceived without sin.
• Why is the Assumption a dogma? — the fourth Marian truth.
• How to explain the Incarnation simply? — the mystery that Mary’s virginity serves and protects.
• Do Catholics worship Mary? — the distinction between worship (reserved for God) and veneration of Mary.
• Doctrine, dogma, and theological opinion — why perpetual virginity is a dogma, not an opinion.