Matthew 4:21

To these, then, such was His promise: but to James and John He saith no such thing. For the obedience of those that had gone before had by this time paved the way for these. And besides they had also heard many things before concerning Him. And see how he doth with exact care intimate unto us their poverty also: in that He found them sewing up their nets. So exceeding great was their poverty, that they were mending what was worn out, not being able to buy others. And this too was for the time no small proof of virtue, their bearing poverty with ease, their supporting themselves by honest labor, their being bound one to another by the power of love, their having their father with them, and attending upon them.

Rightly did He thus build the foundations of the brotherhood of the Church on love, that from such roots a copious sap of love might flow to the branches; and that too on natural or human love, that nature as well as grace might bind their love more firmly. They were moreover brothers; and so did God in the Old Testament lay the foundations of His building on Moses and Aaron, brothers. But as the grace of the New Testament is more abundant than that of the Old, therefore the first people were built upon one pair of brethren, but the new people upon two. They were washing their nets, a proof of the extremest indigence; they repaired the old because they had not whence they should buy new. And what shows their great filial piety, in this their great poverty they deserted not their father, but carried him with them in their vessel, not that he might aid in their labour, but have the enjoyment of his sons' presence. We may not dare to consider the former disciples as more quick to preach, because they were casting their nets; and these latter as less active, because they were yet making ready only; for it is Christ alone that may know their differences. But perhaps we may say that the first were casting their nets, because Peter preached the Gospel, but committed it not to paper—the others were making ready their nets, because John composed a Gospel. He called them together, for by their abode they were fellow-townsmen, in affection attached, in profession agreed, and united by brotherly tenderness. He called them then at once, that united by so many common blessings they might not be separated by a separate call.

(Hom. in Ex. 17:1.) Hereby we are also silently admonished, that he who wants affection towards others, ought not to take on him the office of preaching. The precepts of charity are two, and between less than two there can be no love.

(ap. Anselm.) These last disciples were an example to such as leave their property for the love of Christ; now follows an example of others who postponed earthly affection to God. Observe how He calls them two and two, as He afterwards sent them two and two to preach. (ap Anselm.) and John that he may ascribe the whole to God's grace. The calling of four only is mentioned, as those preachers by whom God will call the four quarters of the world.

By this that they left their occupation and their father's house we are taught, that when we would follow Christ we should not be holden of the cares of secular life, or of the society of the paternal mansion. Or, the number that was to be of the Evangelists is figured.