[Naaman] dipped himself," it says, "seven times in Jordan." It was not for nothing that Naaman of old, when suffering from leprosy, was purified upon his being baptized, but as an indication to us. For as we are lepers in sin, we are made clean by means of the sacred water and the invocation of the Lord from our old transgressions, being spiritually regenerated as new-born babes, even as the Lord has declared: "Except a man be born again through water and the Spirit, he shall not enter into the kingdom of heaven.
Irenaeus of LyonsSince it is impossible, without God, to come to knowledge of God, he teaches men through his Word to know God.
Irenaeus of Lyons[Peter] testified to [the Jews in Acts 2] that Jesus Christ was the Son of God, the Judge of the living and dead, into whom he did also command them to be baptized for the remission of sins.
Irenaeus of LyonsAs long as any one has the means of doing good to his neighbours, and does not do so, he shall be reckoned a stranger to the love of the Lord.
Irenaeus of Lyons