Patristic Wisdom: Looking to the Sixth Sunday of Easter

For Christ also suffered once for sins, the just for the unjust, that He might bring us to God, being put to death in the flesh but made alive by the Spirit, by whom also He went and preached to the spirits in prison, who formerly were disobedient, when once the Divine longsuffering waited in the days of Noah, while the ark was being prepared, in which a few, that is, eight souls, were saved through water. There is also an antitype which now saves us—baptism (not the removal of the filth of the flesh, but the answer of a good conscience toward God), through the resurrection of Jesus Christ, who has gone into heaven and is at the right hand of God, angels and authorities and powers having been made subject to Him. (1 Pet 3:18–22)

Baptism then symbolically signifies the putting off of the works of the flesh; as the apostle says, you were “circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ; buried with him in baptism.” And there is, as it were, a cleansing of the soul from the filth that has grown on it from the carnal mind, as it is written, “You shall wash me, and I shall be whiter than snow.” On this account, we do not wash at each defilement, as is the fashion of the Jews, but own the baptism of salvation to be one. For there the death on behalf of the world is one, and one the resurrection of the dead, whereof baptism is a type. For this cause the Lord, who is the Dispenser of our life, gave us the covenant of baptism, containing a type of life and death, for the water fulfills the image of death, and the Spirit gives us the earnest of life. Hence it follows that the answer to our question why the water was associated with the Spirit is clear: the reason is that in baptism two ends were proposed; on the one hand, the destroying of the body of sin, that it may never bear fruit unto death; on the other hand, our living unto the Spirit, and having our fruit in holiness; the water receiving the body as in a tomb figures death, while the Spirit pours in the quickening power, renewing our souls from the deadness of sin unto their original life.

Basil the Great, On the Holy Spirit 15.35