What is the nature or the function of baptism? The changing of the person baptized in thought and word and action and his transformation according to the power bestowed on him into that of which he has been born.

Saint Basil the Great, “The Morals,” 20, in Saint Basil. Ascetical Works. Translated by Sister M. Monica Wagner, C.S.C. (New York: Fathers of the Church, Inc., 1950) 106.