Luke 9:17

It is clear that the multitude were filled not by a scanty meal, but by a constant and increasing supply of food. You might see in an incomprehensible manner amid the hands of those who distributed, the particles multiplying which they broke not; the fragments too, untouched by the fingers of the breakers, spontaneously mounting up.

Not without meaning are the fragments which remained over and above what the multitudes had eaten, collected by the disciples, since those things which are divine you may more easily find among the elect than among the people. Blessed is he who can collect those which remain over and above even to the learned. But for what reason did Christ fill twelve baskets, except that He might solve that word concerning the Jewish people, His hands served in the basket? (Ps. 81:6.) that is, the people who before collected mud for the pots, now through the cross of Christ gather up the nourishment of the heavenly life. Nor is this the office of few, but all. For by the twelve baskets, as if of each of the tribes, the foundation of the faith is spread abroad.

Nor was this all that the miracle came to; but it follows, And there was taken up of the fragments that remained, twelve baskets, that this might be a manifest proof that a work of love to our neighbour will claim a rich reward from God.

Or by the twelve baskets the twelve Apostles are figured, and all succeeding teachers, despised indeed by men without, but within loaded with the fragments of saving food.

(Orat. Catech. Mag. c. 23.) For whom neither the heaven rained manna, nor the earth brought forth corn according to its nature, but from the unspeakable garner of divine power the blessing was poured forth. The bread is supplied in the hands of those who serve, it is even increased through the fulness of those who eat. The sea supplied not their wants with the food of fishes, but He who placed in the sea the race of fishes.