The Lord was Baptized, not to be cleansed Himself, but to cleanse the waters, so that those waters, cleansed by the flesh of Christ which knew no sin, might have the power of Baptism.
AmbroseUnless a man be born again of water and the Holy Spirit he cannot enter the kingdom of God. No one is excepted, not [even] the infant.
AmbroseIf it is "daily bread," why do you take it once a year? . . . Take daily what is to profit you daily. Live in such a way that you may deserve to receive it daily. He who does not deserve to receive it daily, does not deserve to receive it once a year.
AmbroseThe Church was redeemed at the price of Christ's blood. Jew or Greek, it makes no difference; but if he has believed, he must circumcise himself from his sins [in baptism (Col. 2:11-12)] so that he can be saved . . . for no one ascends into the kingdom of heaven except through the sacrament of baptism . . . "Unless a man be born again of water and the Holy Spirit, he cannot enter the kingdom of God"
Ambrose...Now since you are celebrating the holy Pascha, you should know, brethren, what the Pascha is. Pascha means the crossing-over, and so the Festival is called by this name. For it was on this day that the Children of Israel crossed over out of Egypt, and the Son of God crossed over from this world to His Father. What gain is it to celebrate unless you imitate Him Whom you worship; that is, unless you cross over from Egypt, that is, from the darkness of evildoing to the light of virtue, from the love of this world to the love of your heavenly home?
Ambrose