“And when Jesus was baptized, he went up immediatey from the water, and behold, the heavens were opened, and he saw the Spirit of God descending as a dove, and coming upon him; and behold, a voice out of the heavens, saying, This is my beloved Son, in whom I am well pleased (Matt. 3:16, 17)“. Also, Mark 1:10, 11; Luke 3:21, 22.
St. Cyril of Jerusalem: “Jesus sanctified Baptism by being Himself baptized. If the Son of God was baptized, what godly man would despise Baptism? But Jesus 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 those who 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 (Heb 2:14), 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, so that we again by our participation might receive both salvation and honour. According to Job, there was in the waters the dragon that draws up Jordan into his mouth (Job 40:23). Since, therefore, it was necessary to break the heads of the dragon in pieces (Ps 74:14), Jesus went down and bound the strong one in the waters, that we might receive power to tread upon serpents and scorpions (Luke 10:19). The beast was great and terrible. No fishing-vessel was able to carry one scale of his tail; destruction ran before him (Job 40:26, 41:13 LXX*), ravaging all that met him. The Life encountered him, that the mouth of Death might from then on be stopped, and all we who are saved might say, O death, where is thy sting? O grave, where is thy victory (1 Cor 15:55)? The sting of death is extracted by Baptism.
For you go down into the water bearing your sins, but the invocation of grace, having sealed your soul, will afterwards not allow you to be swallowed up by the terrible dragon. Having gone down dead in sins, you come up quickened in righteousness. For if you have been united with the likeness of the Saviour’s death (Rom 6:5), you shall also be deemed worthy of His Resurrection. For as Jesus took upon Him the sins of the world and died, that by putting sin to death He might rise again in righteousness; so you also, by going down into the water, and being in a manner buried in the waters… are raised again and walking in newness of life (Rom. 6:4).” (St. Cyril (315-386 AD) Bishop of Jerusalem, Doctor of the Church. Part of his Catechesis during Lent in 347 AD when Cyril was still a Priest).”
+ St. Cyril of Jerusalem, pray for us +
*LXX:. Job 40:26: And all the ships come together would not be able to bear the mere skin of his tail; neither shall they carry his head in fishing-vessels. 41:13: And power is lodged in his neck, before him destruction runs. (Septuagint [LXX] the Greek Translation of the Old Testament, the Early Church Scriptures)