Catena Aurea: Mark

We must therefore understand that the transaction which Luke intimates happened first, and afterwards that they, as their custom was, had returned to their fishing. So that what Mark here relates happened afterwards; for in this case they followed the Lord, without drawing their boats ashore, (which they would have done had they meant to return,) and followed Him, as one calling them, and ordering them to follow.

Pseudo-Jerome: Further, we are mystically carried away to heaven, like Elias, by this chariot, drawn by these fishers, as by four horses. On these four corner-stones the first Church is built; in these, as in the four Hebrew letters, we acknowledge the tetragrammation, the name of the Lord, we who are commanded, after their example, to "hear" the voice of the Lord, and "to forget" the "people" of wickedness, and "the house of our fathers' " [Ps 45:10] conversation, which is folly before God, and the spider's net, in the meshes of which we, like gnats, were all but fallen, and were confined by things vain as the air, which hangs on nothing; loathing also the ship of our former walk.

For Adam, our forefather according to the flesh, is clothed with the skins of dead beasts; but now, having put off the old man, with his deeds, following the new man we are clothed with those skins of Solomon, with which the bride rejoices that she has been made beautiful [Song of Songs, 1:4].

Again, Simon, means obedient; Andrew, manly; James, supplanter [ed. note: Cf. vol i, 139, 140, 364]; John, grace; by which four names, we are knit together into God's host [ed. note: Al. in imaginem'] ; by obedience, that we may listen; by manliness, that we do battle; by overthrowing, that we may persevere; by grace, that we may be preserved. Which four virtues are called cardinal; for by prudence, we obey; by justice, we bear ourselves manfully; by temperance, we tread the serpent underfoot; by fortitude, we earn the grace of God.

Theophylact: We must know also, that action is first called, then contemplation; for Peter is the type of the active life, for he was more ardent than the others, just as the active life is the more bustling; but John is the type of the contemplative life, for he speaks more fully of divine things.

21. And they went into Capernaum; and straightway on the sabbath day He entered into the synagogue, and taught.