John Chrysostom

For in His condescension to men, He called the wise men by a star, the fishermen by their art of fishing.

Catena Aurea by Aquinas ↗

Cyril of Alexandria

Having sufficiently taught the people, He returns again to His mighty works, and by the employment of fishing fishes for His disciples. Hence it follows, When he had left off speaking, he said unto Simon, Launch out into the deep, and let down your nets for a draught.

Catena Aurea by Aquinas ↗

Ambrose of Milan

Now in a mystery, the ship of Peter, according to Matthew, is beaten about by the waves, (Matt. 8:24.) according to Luke, is filled with fishes, in order that you might understand the Church at first wavering, at last abounding. The ship is not shaken which holds Peter; that is which holds Judas. In each was Peter; but he who trusts in his own merits is disquieted by another's. Let us beware then of a traitor, lest through one we should many of us be tossed about. …

Catena Aurea by Aquinas ↗

Gregory the Dialogist

Twice in the holy Gospel it is read that the Lord commanded that nets be cast for fishing, namely before the Passion and after the Resurrection. But before our Redeemer suffered and rose again, He commands the net to be cast for fishing, but does not command whether it should be cast on the right or on the left; however, appearing to the disciples after the Resurrection, He commands the net to be cast on the right. …

Forty Gospel Homilies, Homily 24 ↗

Bede

But when he had ceased speaking, he said to Simon: Put out into the deep and let down your nets for a catch. That he first asked Simon to put out the boat a little from the land signifies either to use the word cautiously with the crowds, so that neither earthly things are prescribed to them nor they are removed so deeply from earthly things into the depths of the sacraments that they do not understand them at all, or first to preach to the nearby regions and peoples, so that when he later says again to Peter, "Put out into the deep …

On the Gospel of Luke ↗