Luke 5:7

We have been toiling all night. This refers symbolically to the prophets. His teaching came down from on high on the world, which stands by way of parable for the sea. The two boats represent the circumcised and the uncircumcised. They made a sign to their companions. This refers symbolically to the seventy-two, for these disciples were too few in number for the catch and the harvest.

But the other ship is Judæa, out of which James and John are chosen. These then came from the synagogue to the ship of Peter in the Church, that they might fill both ships. For at the name of Jesus every knee shall bow, whether Jew or Greek.

We may understand also by the other ship another Church, since from one Church several are derived.

(Hom. 6. in Matt.) For in His condescension to men, He called the wise men by a star, the fishermen by their art of fishing.

(de Con. Ev. lib. 4. c. 6.) John seems indeed to speak of a similar miracle, but this is very different from the one he mentions. That took place after our Lord's resurrection at the lake of Tiberias, and not only the time, but the miracle itself is very different. For in the latter the nets being let down on the right side took one hundred and fifty-three fishes, and these of large size, which it was necessary for the Evangelist to mention, because though so large the nets were not broken, and this would seem to have reference to the event which Luke relates, when from the multitude of the fishes the nets were broken.

(ut sup.) Now the circumstance of the nets breaking, and the ships being filled with the multitude of fishes so that they began to sink, signifies that there will be in the Church so great a multitude of carnal men, that unity will be broken up, and it will be split into heresies and schisms.

He told Simon and his companions to sail off a little from the land and to let down the net for a draught. But they replied that they had been toiling the whole night and had caught nothing. However, in the name of Christ, they let down the net, and immediately it was full of fish. By a visible sign and by a miraculous type and representation, they were fully convinced that their labor would be rewarded, and the zeal displayed in spreading out the net of the gospel teaching would be fruitful. Within this net they should most certainly catch the shoals of the heathen. But note that neither Simon nor his companions could draw the net to land. Speechless from fright and astonishment—for their wonder had made them mute—they beckoned to their partners, to those who shared their labors in fishing, to come and help them in securing their prey. For many have taken part with the holy apostles in their labors, and still do so, especially those who inquire into the meaning of what is written in the holy Gospels. Yet besides them there are also others: the pastors and teachers and rulers of the people, who are skilled in the doctrines of truth. For the net is still being drawn, while Christ fills it, and calls to conversion those who, according to the Scripture phrase, are in the depths of the sea, that is to say, those who live in the surge and waves of worldly things.

But Peter beckons to his companions to help them. For many follow the labours of the Apostles, and first those who brought out the writings of the Gospels, next to whom are the other heads and shepherds of the Gospel, and those skilled in the teaching of the truth.

And they signaled to their partners in the other boat to come and help them. The other boat (as we have said before) is the Church of the Gentiles, which also, with one little boat not being sufficient, is filled with elect fish, because the Lord knows who are his, and with him the number of the elect is certain. And when he did not find as many in Judea as he knew to be predestined to faith and eternal life, as if seeking receptacles for his fish in another boat, he also fills the hearts of the Gentiles with the grace of faith. And it is well that, with the net being broken, the partner boat is called, for before Judas the betrayer, before Simon Magus, the abominable fish, were caught, before Ananias and Sapphira tried to deceitfully enter the net of faith, as John testifies, many of his disciples went back and walked no more with him (John VI). And then Barnabas and Paul were set apart for the apostleship to the Gentiles (Acts XIII).

And they came and filled both boats, so that they began to sink. The filling of these boats increases up to the end of the age. But that being filled they begin to sink, that is, they are pressed down in submersion (for they are not submerged, but are, however, endangered), the Apostle explains, saying: In the last days perilous times will come, and men will be lovers of themselves, etc. (II Tim. III). For boats sinking means that people, having been lifted up through faith, fall back into corrupt behavior in the world. This is also demonstrated by Peter himself in this place, still in a state of weakness. Hence it follows:

Or the other ship is the Church of the Gentiles, which itself also (one ship being not sufficient) is filled with chosen fishes. For the Lord knows who are His, and with Him the number of His elect is sure. And when He finds not in Judæa so many believers as He knows are destined to eternal life, He seeks as it were another ship to receive His fishes, and fills the hearts of the Gentiles also with the grace of faith. And well when the net brake did they call to their assistance the ship of their companions, since the traitor Judas, Simon Magus, Ananias and Sapphira, and many of the disciples, went back. And then Barnabas and Paul were separated for the Apostleship of the Gentiles.

But the filling of these ships goes on until the end of the world. But the fact that the ships, when filled, begin to sink, i. e. become weighed low down in the water; (for they are not sunk, but are in great danger,) the Apostle explains when he says, In the last days perilous times shall come; men shall be lovers of their own selves, &c. (2 Tim. 3:1, 2.) For the sinking of the ships is when men, by vicious habits, fall back into that world from which they have been elected by faith.

Peter did not refuse to comply, as it follows, And Simon answering said unto him, Master, we have toiled all night and have taken nothing. He did not go on to say, "I will not hearken to thee, nor expose myself to additional labour," but rather adds, Nevertheless, at thy word I will let down the net. But our Lord, since he had taught the people out of the ship, left not the master of the ship without reward, but conferred on him a double kindness, giving him first a multitude of fishes, and next making him His disciple: as it follows, And when they had done this, they inclosed a great multitude of fishes. They took so many fishes that they could not pull them out, but sought the assistance of their companions; as it follows, But their net brake, and they beckoned to their partners who were in the other ship to come, &c. Peter summons them by a sign, being unable to speak from astonishment at the draught of fishes. We next hear of their assistance, And they came and filled both the ships.