In the first case, when the Lord passed by the fishermen whom He had not seen before, they too had caught nothing by night. They had labored earnestly, but in vain. He ordered them to cast the nets, saying neither “on the right” nor “on the left.” He said, “Launch out your nets for a catch” (Lk 5:4).
Thus, before the Resurrection, the nets are simply cast. After the Resurrection, they are cast on the right side. Further, in the first catch the boats were overloaded and the nets were breaking; see Lk 5:6.
Now, in the catch after the Resurrection, neither is the boat overloaded nor is the net torn. When they fished the first time, the number of fish caught was not mentioned. Now, when they fish after the Resurrection, the exact number of fish is given; compare Lk 5:6 and Jn 21:11.
Let us consider the first catch, so that we may come to the second. In the first case we have nets, the nets of the word, the nets of preaching. Nets, then. Let the Psalm say: “I would declare and speak of them, but they are more than can be numbered” (Ps 39:6).
What happens is clear as day. The Gospel is preached, and the number of Christians exceeds measure. If they all lived uprightly, the boat would not be overloaded. If they were not divided by heresies and schisms, the net would not have been torn.
The last catch pertains to the holy Church, which now exists as a small number of strugglers amid a multitude of wicked men. It will remain within a fixed and limited number, where there will be no place for a sinner.
They will be great fish; see Jn 21:11. All will become immortal, appointed for life without end. What can be greater than that which has no end?
The Evangelist wished that first catch of fish to remain in your memory. Otherwise, why did he add after everything: “And although there were so many, the net was not torn” (Jn 21:11)? It is as though he said, “Remember that first catch, when the net was torn.”
Such will be the Kingdom of Heaven. No heretic will bark there, and no schismatic will depart. All will be together, and all will have peace.
Yet that was a parable in word, not in deed. Here, however, through a deed, the Lord indicated how it will be at the end of the age. So too, in that other catch of fish, He indicated what the Church is like now.
What He did there at the beginning of His preaching, He did here after His Resurrection. There He showed that the catch of fish signifies the good and the evil, whom the Church now has. This catch signifies only the good, whom she will possess forever.
This will be after the resurrection of the dead has taken place at the end of this age. Finally, there Jesus did not stand on the shore, as He does here, when He called them to fish.
Instead, He entered one of the boats, which was Simon’s, and asked him to put out a little from the land. Sitting down, He taught the people from the boat. When He had finished teaching, He said to Simon: “Launch out into the deep, and let down your nets for a catch” (Lk 5:3-4).
There the fish that were caught lay in the boats, and the net was not drawn to land as it is here. These signs, and others if they can be found, there prefigure the Church in this age. Here they prefigure the Church at the end of the age.
That took place before, and this after the Lord’s Resurrection, because there Christ indicated us as called, and here as raised. There the nets were not cast only on the right side, which would have signified only the good.
Nor were they cast only on the left side, which would have signified only the evil. They were cast on different sides. “Let down,” He said, “your nets for a catch,” so that we might understand good and evil mingled together.
Here, however, He said: “Cast the net on the right side of the boat.” By this He indicated those who will stand at the right hand, that is, only the good.
There the net was torn, to indicate schisms. Here, since in that higher world of the saints there will no longer be any schisms, He allowed the Evangelist to say: “And with such fish, that is, with such great ones, the net was not torn.”
It is as though He indicated that the net had been torn then, and here established the good in opposition to that evil.
Blessed Augustine is referring to Roman finger-counting. The Romans counted units and tens on the fingers of the left hand, and hundreds on the fingers of the right hand. In the Latin text of the Gospel, the pronoun tanti can express both quantity, “so many,” and quality, “so great.”
When Blessed Augustine adds the explanation cum tanti essent, id est tam magni, he shows that both senses are joined in this pronoun. This is fitting, since the Evangelist had already said that the fish were large and that their number was one hundred fifty-three.