John Chrysostom
Why, then, does John narrate this with such detail? Why did he not simply say that on the next day the people also crossed to the other side? By this he wishes to show us something else.
What is it? Christ gave even the people an opportunity to understand what had happened, not directly, but indirectly. They saw, he says, “that there was no other boat there except one, and that Jesus had not entered the boat.” Then, entering the boats from Tiberias, they “came to Capernaum, seeking Jesus.”
What else, indeed, could one think except that He had crossed the sea by walking upon it? For it could not be said that He had crossed in some other boat. “There was no other boat there,” it says, “except the one into which His disciples had entered.”