Hilary of Poitiers — as excerpted in the Catena Aurea on John 6:1-14

“(iii. de Trin. c. 18) Five loaves are then set before the multitude, and broken. The broken portions pass through into the hands of those who break, that from which they are broken all the time not at all diminishing. And yet there they are, the bits taken from it, in the hands of the persons breakingd. There is no catching by eye or touch the miraculous operation: that is, which was not, that is seen, which is not understood. It only remains for us to believe that God can do all things.”