7 Lastly, what did those men who saw this miracle think? “The men,” says he, “when they had seen the sign which He had done, said, This is indeed a prophet.” Perhaps they still thought Christ to be a prophet for this reason, namely, that they were sitting on the grass. But He was the Lord of the prophets, the fulfiller of the prophets, the sanctifier of the prophets, but yet a prophet also: for it was said to Moses, “I will raise up for them a prophet like you.” Like, according to the flesh, but not according to the majesty.
And that this promise of the Lord is to be understood concerning Christ Himself, is clearly expounded and read in the Acts of the Apostles. And the Lord says of Himself, “A prophet is not without honor, except in his own country.” The Lord is a prophet, and the Lord is God's Word, and no prophet prophesies without the Word of God: the Word of God is with the prophets, and the Word of God is a prophet. The former times obtained prophets inspired and filled by the Word of God: we have obtained the very Word of God for our prophet.
But Christ is in such manner a prophet, the Lord of prophets, as Christ is an angel, the Lord of angels. For He is also called the Angel of great counsel. Nevertheless, what says the prophet elsewhere that not an ambassador, nor an angel, but Himself coming will save them; that is, He will not send an ambassador to save them, nor an angel, but Himself will come. Who will come? The Angel himself? Certainly not by an angel will He save them, except that He is so an angel, as also Lord of angels.
For angels signify messengers. If Christ brought no message, He would not be called an angel: if Christ prophesied nothing, He would not be called a prophet. He has exhorted us to faith and to laying hold of eternal life; He has proclaimed something present, foretold something future because He proclaimed the present, thence He was an angel or messenger; because He foretold the future, thence He was a prophet; and that, as the Word of God He was made flesh, thence He was Lord of angels and of prophets.
Source: Tractates on the Gospel of John (New Advent)