In the book of Genesis the Scriptures say: "And God saw the light, that it is good. And God divided the light and the darkness, and God called the light day and the darkness he called night." (Gen 1:4-5). If God called the light day, then surely those to whom the Apostle Paul said, "You were once darkness, but now light in the Lord" (Eph 5:8), were the day, because he who commanded the light to shine out of darkness has shone upon them (2 Cor 4:6). These children (infantes), whom you see white in their outward dress and inwardly cleansed, whose bright clothing symbolizes the brilliance of their minds, were weighed down by the night of their sins. But now because they have been cleansed in the bath of mercy, because they have been watered by the fountain of wisdom, because they have been flooded by the light of righteousness: "This is the day the Lord has made: let us rejoice and be glad in it" (Ps 117:24). May the day of the Lord listen to us; may the day made by the Lord listen to us: may it listen and obey so that we may rejoice and be glad in it. For, as the Apostle says, this is our joy and our crown, if you stand fast in the Lord (Ph 4:1). Listen to us, then, O tender children of the chaste mother, listen to us, children of the virgin mother. Because "you were once darkness but now light in the Lord, walk as children of the light." Cling to the children of light; let me put it more clearly: Cling to the good believers. For, unfortunately, there are evil believers. There are people called believers who arent believers. There are believers in whom the mysteries of Christ suffer injury, who live in such a way that they are perishing and causing others to perish,perishing because of their evil lives,causing others to perish by their bad example. But you, beloved, dont join them. Seek out the good and cling to them. Be good yourselves. (Augustine, Sermon 223, Easter Vigil V, #1; PL 38,1092)