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.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).