Psalms 74:14

Jesus sanctified Baptism by being Himself baptized. If the Son of God was baptized, what godly man is he that despiseth Baptism? But He was baptized not that He might receive remission of sins, for He was sinless; but being sinless, He was baptized, that He might give to them that are baptized a divine and excellent grace. For since the children are partakers of flesh and blood, He also Himself likewise partook of the same, that having been made partakers of His presence in the flesh we might be made partakers also of His Divine grace: thus Jesus was baptized, that thereby we again by our participation might receive both salvation and honour. According to Job, there was in the waters the dragon that draweth up Jordan into his mouth. Since, therefore, it was necessary to break the heads of the dragon in pieces, He went down and bound the strong one in the waters, that we might receive power to tread upon serpents and scorpions. The beast was great and terrible. No fishing-vessel was able to carry one scale of his tail: destruction ran before him, ravaging all that met him. The Life encountered him, that the mouth of Death might henceforth be stopped, and all we that are saved might say, O death, where is thy sting? O grave, where is thy victory? The sting of death is drawn by Baptism.

What more after the heads of dragons? For those dragons have their chief, and he is himself the first great dragon. And concerning him what hath He done that hath wrought Salvation in the midst of the earth? Hear: "Thou hast broken the head of the dragon" (ver. 14). Of what dragon? We understand by dragons all the demons that war under the devil: what single dragon then, whose head was broken, but the devil himself ought we to understand? What with him hath He done? "Thou hast broken the head of the dragon." That is, the beginning of sin. That head is the part which received the curse, to wit that the seed of Eve should mark the head of the serpent. For the Church was admonished to shun the beginning of sin. Which is that beginning of sin, like the head of a serpent? The beginning of all sin is pride. There hath been broken therefore the head of the dragon, hath been broken pride diabolical. And what with him hath He done, that hath wrought Salvation in the midst of the earth? "Thou hast given him for a morsel to the Ethiopian peoples." What is this? How do I understand the Ethiopian peoples? How but by these all nations? And properly by black men: for Ethiopians are black. They are themselves called to the faith who were black; the very same indeed, so that there is said to them, "for ye were sometime darkness, but now light in the Lord." ...Thence was also that calf which the people worshipped, unbelieving, apostate, seeking the gods of the Egyptians, forsaking Him who had delivered them from the slavery of the Egyptians: whence there was enacted that great Sacrament. For when Moses was thus wroth with them worshipping and adoring the idol, and, inflamed with zeal for God, was punishing temporally, in order that he might terrify them to shun death everlasting; yet the head itself of the calf he cast into the fire, and ground to powder, destroyed, strawed on the water, and gave to the people to drink: so there was enacted a great Sacrament. O anger prophetic, and mind not perturbed but enlightened! He did what? Cast it into the fire, in order that first the form itself may be obliterated; piece by piece grind it down, in order that little by little it may be consumed: cast it into the water, give to the people to drink! What is this but that the worshippers of the devil were become the body of the same? In the same manner as men confessing Christ become…