The supernatural dignity of one who has been baptized rests, we know, on the natural dignity of man, though it surpasses it in an infinite manner (. . .) . Thus the unity of the Mystical Body of Christ, a supernatural unity, supposes a previous natural unity, the unity of the human race. So the Fathers of the Church, in their treatment of grace and salvation, kept constantly before them this Body of Christ, and in dealing with the creation were not content only to mention the formation of individuals, the first man and the first woman, but delighted to contemplate God creating humanity as a whole. "God", says St Irenaeus, for example, "in the beginning of time plants the vine of the human race ; he loved this human race and purposed to pour out his Spirit upon it and to give it the adoption of sons."1 For Irenaeus again, as indeed for Origen,2 Gregory Nazianzen, Gregory of Nyssa, for Cyril of Alexandria, Maximus, Hilary and others, the lost sheep of the Gospel that the Good Shepherd brings back to the fold is no other than the whole of human nature; its sorry state so moves the Word of God that he leaves the great flock of the angels, as it were to their own devices, in order to go to its help. The Fathers designated this nature by a series of equivalent expressions, all of a concrete nature, thus demonstrating that it was in their view a genuine reality.
They seemed to witness its birth, to see it live, grow, develop, as a single being. With the first sin it was this being, whole and entire, which fell away, which was driven out of Paradise and sentenced to a bitter exile until the time of its redemption. And when Christ at last appeared, coming as the "one bridegroom", his bride, once again, was the "whole human race".
Our early Fathers' habitual manner of thought must be borne in mind if we would understand certain strange ways of speaking—whatever their precise origin—that are met with in such writers as Methodius of Olympus, who appears to make of Christ a new appearance of Adam himself brought back to life by the Word.3 If several of them held so strongly, as we know, that Adam was saved, one of the reasons for it was undoubtedly that they saw the salvation of its head as the necessary condition of the salvation of the human race. "This Adam, within us all", says one of the homilies of Pseudo-Epiphanius.4 And another homily, of Pseudo-Chrysostom : "By the sacrifice of Christ the first man was saved, that man who is in us all." 5 Is not this also the inner meaning of the legend according to which Adam, who had been buried on Calvary, was baptized by the water which flowed from the side of Jesus? Surely, too, the many liturgical texts about the descent of Christ into " hell", where the first man is alone mentioned, are, like the works of art which correspond with them, indications that that same way of thought continued until much later.
Before embarking on the study of this human nature, from its beginning until the end of the world, the Fathers made a fundamental examination of it in order to perceive the principle of its unity. Now this principle appeared no different to them from that on which rests the natural dignity of man. Was it not shown to them in Genesis, where it was taught that God made man in his own image? For the divine image does not differ from one individual to another : in all it is the same image. The same mysterious participation in God which causes the soul to exist effects at one and the same time the unity of spirits among themselves. Whence comes the notion, so beloved of Augustinianism, of one spiritual family intended to form the one city of God.
(...)
Clement of Alexandria, in pages brimming over with poetry, after exposing the baseness of the pagan mystery cults, extols the mysteries of the Logos and displays the "divine Choregus" calling all men to him :
Be instructed in these mysteries and you shall dance with the choir of angels before the uncreated God, whilst the Logos will sing the sacred hymns with us. This eternal Jesus, the one high priest, intercedes for men and calls on them: "Hearken," he cries, "all you peoples, or rather all you who are endowed with reason, barbarians or Greeks! I summon the whole human race, I who am its author by the will of the Father! Come unto me and gather together as one well-ordered unity under the one God, and under the one Logos of God."151 Adversus Haereses, passim.
2 In Genesim, horn. 2, 5 ; 9, 3; 13, 2 (Baehrens, pp. 34, 92, 114).
3 Methodius of Olympus, Symposium, 3, c. 4-8 (French trans. by Farges, pp. 42-52).
4 Homily 2 (P.G. xliii, 460—I).
5 In Pascha, sermo 2; cf. sermo 1 (P.G. lix, 725 and 723).
15 Protreptic, c.12.
Henri de Lubac, Catholicism: A Study of Dogma in Relation to the Corporate Destiny of Mankind (1947; tr. 1958), 3-6