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.
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. Trouble is found there where faith is weak, safety here where love is perfect. Lastly, though to others it is commanded, Let down your nets, to Peter alone it is said, Launch out into the deep, i. e. into deep researches. What is so deep, as the knowledge of the Son of God! But what are the nets of the Apostles which are ordered to be let down, but the interweaving of words and certain folds, as it were, of speech, and intricacies of argument, which never let those escape whom they have once caught. And rightly are nets the Apostolical instruments for fishing, which kill not the fish that are caught, but keep them safe, and bring up those that are tossing about in the waves from the depths below to the regions above. But he says, Master, we have toiled the whole night and have caught nothing; for this is not the work of human eloquence but the gift of divine calling. But they who had before caught nothing, at the word of the Lord inclosed a great multitude of fishes.
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.
(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.
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.
Now this was a figure of the future. For they will not labour in vain who let down the net of evangelical doctrine, but will gather together the shoals of the Gentiles.
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.
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.
He chooses Peter’s boat and forsakes Moses’—that is to say, he spurns the faithless synagogue and takes the faithful church. For God appointed the two as boats, so to speak, which would fish for the salvation of humankind in this world as in a sea. As the Lord says to the apostles, “Follow me, and I will make you fishers of men.” …The church is called out into the deep, delving, as it were, into the profound mysteries of the heavens, into that depth concerning which the apostle says, “O the depth of the riches and wisdom and knowledge of God!” For this reason he says to Peter, “Put out into the deep,”—that is to say, into the depths of reflection upon the divine generation. For what is more profound than what Peter says to the Lord, “You are the Christ, the Son of the living God?” …
This boat sails upon the deeps of this world, so that, when the earth is destroyed, it will preserve unharmed all those it has taken in. Its foreshadowing can be seen already in the Old Testament. For as Noah’s ark preserved alive everyone whom it had taken in when the world was going under, so also Peter’s church will bring back unhurt everyone whom it embraces when the world goes up in flames. And as a dove brought the sign of peace to Noah’s ark when the flood was over, so also Christ will bring the joy of peace to Peter’s church when the judgment is over.
That you may understand that the Lord was speaking of spiritual fishing, however, Peter says, “Master, we toiled all night and took nothing! But at your word I will let down the nets.” It is as if he were saying, “Through the whole night our fishing has brought us nothing, and we have been laboring in vain. Now I will not fish with fishing gear but with grace, not with diligence acquired by skill but with the perseverance acquired by devotion.” When Peter lets down the nets at the word, therefore, he is in fact letting down the teachings in Christ. When he unfolds the tightly woven and well-ordered nets at the command of the Master, he is really laying out words in the name of the Savior in a fitting and clear fashion. By these words he is able to save not creatures but souls. “We toiled all night,” he says, “and took nothing.” Peter, who beforehand was unable to see in order to make a catch, enduring darkness without Christ, had indeed toiled through the whole night. But when the Savior’s light shone upon him the darkness scattered, and by faith he began to discern in the deep what he could not see with his eyes.
And when he had done this, they enclosed a large multitude of fish. However, their net was breaking. By the great number of fish, the net was breaking, for now even reprobates, together with the elect, enter in such a number at the confession of faith, who also tear the Church itself with heresies. The net breaks, but the fish do not slip away, for the Lord preserves his own even among the scandals of persecutors.
The net is broken, but the fish escape not, for the Lord preserves His own amid the violence of persecutors.
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.
[AD 373] Ephrem the Syrian on Luke 5:4-7