4 Now let John also declare his witness: “After these things came Jesus and His disciples into the land of Judea; and there He tarried with them, and baptized.” Being baptized, He baptized. Not with that baptism with which He was baptized did He baptize. The Lord, being baptized by a servant, gives baptism, showing the path of humility and leading to the baptism of the Lord, that is, His own baptism, by giving an example of humility, in not Himself refusing baptism from a servant.
And in the baptism by a servant, a way was prepared for the Lord; the Lord also being baptized, made Himself a way for them that come to Him. Let us hear Himself: “I am the way, the truth, and the life.” If you seek truth, keep the way, for the way and the truth are the same. The way that you are going is the same as the whither you are going: you are not going by a way as one thing, to an object as another thing; not coming to Christ by something else as a way, you come to Christ by Christ.
How by Christ to Christ? By Christ the man, to Christ God; by the Word made flesh, to the Word which in the beginning was God with God; from that which man ate, to that which angels daily eat. For so it is written, “He gave them bread of heaven: man ate the bread of angels.” What is the bread of angels? “In the beginning was the Word, and the Word was with God, and the Word was God.” How has man eaten the bread of angels? “And the Word was made flesh, and dwelt among us.”
Source: Tractates on the Gospel of John (New Advent)