By a Tree We Were Lost; By a Tree We Are Saved

Today the Catholic Church celebrates one of the most ancient and breathtaking feasts on her calendar: the Exaltation of the Holy Cross. (Earlier English editions of the Roman Missal called it the Triumph of the Cross; Exaltation of the Holy Cross is the official title in the Roman calendar.) The liturgical color is red, which Christian devotion has long read as the color of blood and of victory. And the readings appointed for the day in the Roman Rite trace an arc so vast it stretches from the first pages of Genesis to the cosmic proclamation of Philippians, from a tree in a garden to a tree on a hill, from the wound that killed us to the wound that healed us.

The readings are Numbers 21:4b–9, Psalm 78, Philippians 2:6–11, and John 3:13–17. Taken together, they tell a single story: the story of what God did with a piece of wood.

I. The Tree Where We Were Lost

It begins in a garden.

The Book of Genesis places two named trees at the center of Eden: the Tree of Life and the Tree of the Knowledge of Good and Evil. God gives one command: do not eat from the second tree. The serpent deceives Eve; she eats and gives the fruit to Adam, and Adam joins her in disobedience (Genesis 3:1–6). The consequences are catastrophic. Shame enters the world. Death enters the world. The man and the woman are driven out, and the way to the Tree of Life is barred by cherubim and a flaming sword (Genesis 3:24).

Notice the setting. It was not the tree that destroyed us; it was disobedience. But that disobedience was not committed in the abstract. It was committed at a tree, in the act of reaching out and taking its fruit. The wood was present from the beginning. And the Church Fathers, those towering figures of the first Christian centuries, seized on this with extraordinary force. If death came by way of a tree, they taught, then it was fitting that God should restore life by way of a tree (Saint Irenaeus, Against Heresies V, 16, 3). This is typology, not mechanics: the tree of Eden does not explain the Cross, but the Cross answers Eden.

Saint Irenaeus of Lyon, writing in the second century, gave this pattern its name: recapitulation. Christ, the New Adam, “recapitulated” — took up, summed up, and reversed — every element of the Fall. At the tree in Eden, in the traditional Christian reading, Adam grasped at what belonged to God. At the tree of the Cross, Christ obeyed — he who “did not regard equality with God something to be grasped” (Philippians 2:6). At the tree in Eden, Eve listened to the serpent, understood by Christian tradition as the fallen angel, and said yes to disobedience. At the Annunciation, Mary listened to a holy angel and said yes to God. In the words of Irenaeus, which the Second Vatican Council and the Catechism both make their own: “The knot of Eve’s disobedience was untied by Mary’s obedience; what the virgin Eve bound through her unbelief, the Virgin Mary loosened by her faith” (Against Heresies III, 22, 4; quoted in Lumen Gentium 56 and Catechism of the Catholic Church 494). What was done at the wood of the forbidden tree was undone at the wood of the Cross.

The Church prays this very pattern in the Preface of today’s Mass:

For you placed the salvation of the human race on the wood of the Cross, so that, where death arose, life might again spring forth and the evil one, who conquered on a tree, might likewise on a tree be conquered, through Christ our Lord. Roman Missal, Preface of the Exaltation of the Holy Cross (“The Victory of the Glorious Cross”)

By a tree we were lost. By a tree we are saved.

II. The Serpent That Healed

If the first thread is the tree, the second is the serpent, and the first reading of today’s Mass brings us face to face with one of the strangest and most paradoxical episodes in all of Scripture.

In Numbers 21, the Israelites are wandering in the desert, tired and rebellious. They complain against God and against Moses. In punishment, the Lord sends saraph serpents among the people, and many die. When the people repent, God does not simply remove the serpents. Instead he tells Moses: “Make a saraph and mount it on a pole, and if any who have been bitten look at it, they will live” (Numbers 21:8). Moses fashions a bronze serpent and raises it on a pole. And whoever looks upon it lives.

The serpent, the creature associated in Genesis with temptation and sin, is now fashioned by divine command into the instrument of healing. The people are not told to destroy it or flee from it. They are told to gaze upon it in faith. The image of the thing that kills becomes the means of being saved.

Here is where today’s Gospel ignites the whole passage. In his nighttime conversation with Nicodemus, Jesus declares:

Just as Moses lifted up the serpent in the desert, so must the Son of Man be lifted up, so that everyone who believes in him may have eternal life. John 3:14–15

The phrase “lifted up” carries a deliberate double meaning: it refers to the physical lifting of Christ on the Cross and to his exaltation in glory — a meaning John makes explicit later in the Gospel: “And when I am lifted up from the earth, I will draw everyone to myself” (John 12:32), the very words the Church sings as today’s Communion Antiphon. Immediately after comes the verse that has been called the Gospel in miniature:

For God so loved the world that he gave his only Son, so that everyone who believes in him might not perish but might have eternal life. John 3:16

The bronze serpent on the pole was a type, a divinely ordained foreshadowing, of Christ on the Cross. The people in the desert were healed not by looking away from the serpent but by looking at it. So too, Christians are healed not by looking away from the Cross but by gazing upon the Crucified One in faith and receiving the life that flows from his sacrifice.

God’s salvation is more than the simple cancellation of a penalty: in Christ he enters the consequences of sin and transforms the Cross — the instrument of death — into the instrument of life.

III. The New Tree of Life

If the Cross is the new Tree of Life, what does that mean?

In the Church’s theological and liturgical imagination, it means the cherubim have stepped aside. The flaming sword has been sheathed. The way to the Tree of Life, barred since the expulsion from Eden, has been reopened — not through a garden gate but through the wood of the Cross. Many of the Fathers and early Christian writers taught this, and few more memorably than Saint Cyril of Jerusalem, who preached in Jerusalem only a few decades after the discovery traditionally associated with Constantine’s reign. Citing the words of Saint Paul that stand at the head of this article, he declared:

Every deed of Christ is a cause of glorying to the Catholic Church, but her greatest of all glorying is in the Cross. Saint Cyril of Jerusalem, Catechetical Lectures 13, 1

For Cyril, the Cross was not one mystery among many but the supreme mystery, the glory above all glories. He enumerated the wonders Christ performed — sight given to a man born blind, Lazarus raised, five thousand fed — and insisted that each of them, great as it was, reached only some. The Cross reached all: “The glory of the Cross led those who were blind through ignorance into light, loosed all who were held fast by sin, and ransomed the whole world of mankind” (Catechetical Lectures 13, 1). The miracles healed individuals; the Cross healed the world.

In Christian art from late antiquity onward, the Cross was often depicted as a living, growing tree, sprouting leaves, flowers, and fruit. This is the crux florida, the flourishing Cross — the great apse mosaic of San Clemente in Rome is its most celebrated example — and it proclaims that the wood of execution was in truth the wood of life. The Book of Revelation completes the pattern: in the heavenly Jerusalem the Tree of Life stands once more, bearing fruit every month, and “the leaves of the trees serve as medicine for the nations” (Revelation 22:2). The tree at the beginning, the Cross at the center, and the Tree of Life at the end — Genesis, Calvary, Revelation — form the backbone of salvation history.

IV. A Legend of Holy Wood

Among the most remarkable traditions in Christian literature is the Legend of the Wood of the Cross, a narrative preserved in numerous medieval manuscripts that traces the physical wood of Christ’s Cross all the way back to the Garden of Eden. It should be said plainly at the outset: this is legend, not history, and the Church does not require the faithful to accept it as historical fact. But it is legend of a very high order.

In one of its best-known forms, the story tells that when Adam lay dying, he sent his son Seth back to the gates of Eden. An angel gave Seth three seeds from the Tree of Life and told him to place them under Adam’s tongue at his burial. Three shoots sprouted from Adam’s grave — cedar, cypress, and pine — a figure of the Trinity. The legend follows the wood through the ages: Moses discovers it during the Exodus; David transplants it to Jerusalem; Solomon tries to use it in the Temple, but the wood refuses to fit any measure. Eventually it is cast over a stream as a footbridge — the very bridge before which the Queen of Sheba kneels in prophecy. In some versions it comes to rest in the Pool of Bethesda. And finally, on Good Friday, the wood is fashioned into the Cross of Christ.

The legend insists on wood — not stone, not metal — because it was wood that connected the Cross to the living tree of Eden. As theological poetry, it expresses something the Church does teach: that the death of Jesus “was not the result of chance in an unfortunate coincidence of circumstances, but is part of the mystery of God’s plan” (Catechism of the Catholic Church 599). The Cross was not outside God’s providential plan, even though those who condemned and crucified Jesus acted through sin.

V. Helena and the Finding of the True Cross

The legend of the wood reaches back to Eden; the history of the wood is anchored in a particular time and place. Here, too, we must distinguish what is documented from what later tradition supplied.

What is historically well attested is this. An imperial building project authorized and funded under Constantine excavated the site traditionally identified with Christ’s death and burial in Jerusalem, which for nearly two centuries had lain beneath a pagan temple. His biographer Eusebius describes the temple of Venus that stood there and the uncovering of the tomb, but says nothing about the finding of the Cross. Within a generation, however, Saint Cyril of Jerusalem could speak of the wood of the Cross as something seen and venerated in that city, and by the 380s the pilgrim Egeria describes the faithful filing past the relic to kiss it on Good Friday. A relic associated with the Cross came to be venerated at Golgotha under Constantine, and the Church of Jerusalem held it to be the Cross of the Lord from the earliest years for which we have witnesses.

The part played by Saint Helena, Constantine’s mother, who made her pilgrimage to the Holy Land in those same years, is first recorded some seventy years later, in Saint Ambrose’s funeral oration for the Emperor Theodosius (395) and in the Ecclesiastical History of Rufinus of Aquileia (about 402). According to these and later accounts, Helena’s excavations uncovered three crosses, believed to be those of Jesus and the two thieves crucified with him. Christian tradition recounts that the question of which was the Cross of Christ was settled by a miracle: when a gravely ill woman touched the third cross, she was healed at once. The details vary from one account to another — the rock cistern in which the crosses were said to lie, the part played by Bishop Macarius of Jerusalem, the identity of the person healed — and the historical record does not allow us to confirm them. What the record does show is a Church that, from the fourth century onward, received and venerated the wood as the true Cross.

Ambrose also gives the tradition its proper focus. Helena, he insists, adored the King and not the wood; she worshipped him who hung upon it, for to adore the wood itself would be a pagan error (On the Death of Theodosius 46). The relic was never an end in itself but the material through which Christ accomplished the world’s salvation.

The September 14 feast is connected with the dedication of Constantine’s basilica in Jerusalem — the Church of the Holy Sepulchre — in September 335 and, in its later development, with the exaltation and restoration of the Cross. Egeria reports that Jerusalem kept the anniversary of that dedication with the highest solemnity because the Cross had been found on the same day. Tradition places the dedication on September 13 and the first public showing of the relic to the assembled faithful on the following day, September 14. That lifting up of the wood before the people — the exaltatio — gave our feast its name. The development was not identical in the Jerusalem, Byzantine, Gallican, and Roman traditions. The feast entered the Roman liturgical tradition in the seventh century, and the Roman observance also came to commemorate the recovery of the Cross from Persia and its restoration to Jerusalem.

VI. The Corpus on the Cross

Catholics often display a crucifix rather than a bare cross — a cross bearing the corpus, the body of Christ. This is not merely a matter of taste; it makes visible the theology of Christ crucified.

The General Instruction of the Roman Missal directs that “there is also to be a cross, with the figure of Christ crucified upon it, either on the altar or near it, where it is clearly visible to the assembled congregation” (GIRM 308). The reason lies in what the Mass is. In the Mass the one sacrifice of Calvary is made sacramentally present — “re-presented,” in the Catechism’s own word — not repeated: “The sacrifice of Christ and the sacrifice of the Eucharist are one single sacrifice” (Catechism of the Catholic Church 1366–1367). The crucifix stands beside the altar because the Sacrifice is present upon it. And it makes especially visible the connection between the bronze serpent and Christ lifted up on the Cross. If the bronze serpent was a visible image upon which the people were to gaze in order to be healed, then the crucifix is its fulfillment: the visible image of the Crucified One upon which believers gaze in faith to receive salvation.

The crucifix does not say “Christ is still dead.” The Church never separates the Cross from the Resurrection; the risen Lord still bears his wounds and shows them to Thomas (John 20:27). What the crucifix says is: “Christ loved you this much.” It affirms the reality of the Incarnation — God truly took flesh and truly suffered. It speaks to the suffering of every age: whoever looks upon the crucifix sees a God who has entered the depths of human pain. And it preserves the heart of the Philippians hymn: the Cross is God’s definitive act of self-revelation, a word spoken in the only language a sin-broken world can understand, the language of self-sacrificing love.

VII. Relics and Devotion

Fragments of the True Cross are venerated to this day, from the Basilica of Santa Croce in Gerusalemme in Rome to the monasteries of Mount Athos. Already in the middle of the fourth century, barely a generation after the discovery, Saint Cyril could write that “the whole world has since been filled with pieces of the wood of the Cross” (Catechetical Lectures 4, 10). Across the centuries, healings and other graces have been attributed to contact with these fragments. The Church insists on prudence and rejects superstition in the veneration of relics: she requires care regarding their authenticity, and the current Code of Canon Law forbids the sale of sacred relics (can. 1190 §1). The relic is honored, as Ambrose said of Helena, not for the wood’s sake but for the sake of the One who hung upon it.

A Prayer for the Feast

Today the Church exalts the Cross. She lifts it up before the world and says: Look.

The Responsorial Psalm of the day answers with its refrain, “Do not forget the works of the Lord!” (cf. Psalm 78:7). And the Philippians hymn reveals the inner meaning of everything we have traced: Christ Jesus, “though he was in the form of God … emptied himself, taking the form of a slave … becoming obedient to death, even death on a cross. Because of this, God greatly exalted him and bestowed on him the name that is above every name” (Philippians 2:6–9).

The Cross is not one mystery among many. It is the center. It is the hinge upon which the entire story of salvation turns.

Look at the wood. Look at the nails. Look at the body. And believe that God so loved the world.

O Crux, ave, spes unica!
In hac triumphi gloria
piis adauge gratiam,
reisque dele crimina. Vexilla Regis, in the form sung on the feasts of the Holy Cross

Hail, O Cross, our only hope! In this glory of your triumph, increase grace in the faithful and blot out the sins of the guilty.

We adore you, O Christ, and we bless you, because by your Holy Cross you have redeemed the world.