Theophylact of Ohrid
Catena Aurea · Markusevangelium 1
Now as he walked by the sea of Galilee, he saw Simon and Andrew his brother casting a net into the sea: for they were fishers. And Jesus said unto them, Come ye after me, and I will make you to become fishers of men. And straightway they forsook their nets, and followed him. And when he had gone a little farther thence, he saw James the son of Zebedee, and John his brother, who also were in the ship mending their nets. And straightway he called them: and they left their father Zebedee in the ship with the hired servants, and went after him.
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.