Bede the Venerable
Catena Aurea · Johannesevangelium 6
When Jesus therefore perceived that they would come and take him by force, to make him a king, he departed again into a mountain himself alone. And when even was now come, his disciples went down unto the sea, And entered into a ship, and went over the sea toward Capernaum. And it was now dark, and Jesus was not come to them. And the sea arose by reason of a great wind that blew. So when they had rowed about five and twenty or thirty furlongs, they see Jesus walking on the sea, and drawing nigh unto the ship: and they were afraid. But he saith unto them, It is I; be not afraid. Then they willingly received him into the ship: and immediately the ship was at the land whither they went.
(in Matt. c. xiv.) He does not say, I am Jesus, but only I am. He trusts to their easily recognising a voice, which was so familiar to them, or, as is more probable, He shews that He was the same who said to Moses, I am that I am (Exod. 3:14)