Fathers_of_the_ChurchChrist took a soul with the flesh from Mary.

This He came to save. This He left not in hell. This He joined to His Spirit and made His own.

And this is the marriage of the Lord, joined together to one flesh, that according to that great sacrament, might be these two in one flesh, Christ and the Church. 

From this marriage is born the Christian people, the Spirit of the Lord coming from above.

And straightway the heavenly seed being poured upon and mingled with the substance of our souls, we grow in the bowels of our mother, and coming forth from her womb are made alive in Christ.

Whence the Apostle, The first Adam was made a living soul; the last Adam was made a quickening Spirit. 

Thus Christ begets in the Church by His Priests, as says the same Apostle, For in Christ Jesus have I begotten you. 

And so the seed of Christ, that is, the Spirit of God produces, by the hands of the Priests, the new man conceived in the womb of our Mother, and received at the birth of the font, faith presiding over the marriage rite.

For neither will he seem to be engrafted into the Church, who has not believed, nor he to be born again of Christ, who has not himself received the Spirit.

We must believe therefore that we can be born…. Christ therefore must be received that He may beget, for as the Apostle John says, As many as received Him, to them gave He power to become the sons of God. 

[…] By the water of baptism sins are washed away, by Chrism the Holy Spirit is poured out, but both these we obtain at the hand and the mouth of the Bishop.

And so the whole man is born again and renewed in Christ, that like as Christ was raised up from the dead, even so we also should walk in newness of life.

That is, that having laid aside the errors of our former life, the serving of idols, cruelty, fornication, wantonness, and all other vices of flesh and blood, we should through the Spirit follow new ways in Christ, faith, modesty, innocence, chastity.

And as we bore the image of the earthy, so also should we bear His, Who is from Heaven, for the first man is of the earth, earthy; the Second from heaven, heavenly.

This if we do, most beloved, we shall die no more. Although we be dissolved in this body, we shall live in Christ, as He Himself says, He that believeth in Me, though he were dead, yet shall he live. 

Pacian of Barcelona (c.310-391): Discourse on Baptism, 7.