Now He is baptized not as Himself requiring purification but as making my purification His own, that He may break the heads of the dragons on the water, that He may wash away sin and bury all the old Adam in water, that He may sanctify the Baptist, that He may fulfil the Law, that He may reveal the mystery of the Trinity, that He may become the type and ensample to us of baptism. But we, too, are baptized in the perfect baptism of our Lord, the baptism by water and the Spirit.
[St. John Damascene, An Exposition of the Orthodox Faith, Book IV, Chapter 9.]
