Matthew 4:20

But mark both their faith, and their obedience. For though they were in the midst of their work (and ye know how greedy a thing fishing is), when they heard His command they delayed not, they procrastinated not, they said not, "let us return home, and converse with our kinsfolk," but "they forsook all and followed," even as Elisha did to Elijah. Because such is the obedience which Christ seeks of us, as that we delay not even a moment of time, though something absolutely most needful should vehemently press on us. Wherefore also when some other had come unto Him, and was asking leave to bury his own father, not even this did He permit him to do: to signify that before all we ought to esteem the following of Himself. But if thou should say, "the promise is very great;" even for this do I most admire them, for that when they had not as yet seen any sign, they believed in so great a reach of promise, and accounted all but second to that attendance. And this, because they believed that by what words they were caught, by the same they would be able to catch others also.

These disciples did not follow Christ from desire of the honour of a doctor, but because they coveted the labour itself; they knew how precious is the soul of man, how pleasant to God is his salvation, and how great its reward. These were their desires, for which they left all and followed; teaching us thereby that none can possess earthly things and perfectly attain to heavenly things.

(Hom. in Evan. v. 1.) Peter and Andrew had seen Christ work no miracle, had heard from him no word of the promise of the eternal reward, yet at this single bidding of the Lord they forgot all that they had seemed to possess, and straightway left their nets, and followed Him. In which deed we ought rather to consider their wills than the amount of their property. He leaves much who keeps nothing for himself, he parts with much, who with his possessions renounces his lusts. Those who followed Christ gave up enough to be coveted by those who did not follow. Our outward goods, however small, are enough for the Lord; He does not weigh the sacrifice by how much is offered, but out of how much it is offered. The kingdom of God is not to be valued at a certain price, but whatever a man has, much or little, is equally available.

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.

(Serm. 197. 2.) He chose not kings, senators, philosophers, or orators, but he chose common, poor, and untaught fishermen. (Aug. Tract. in Joann. vii. 17.) Had one learned been chosen, he might have attributed the choice to the merit of his learning. But our Lord Jesus Christ, willing to bow the necks of the proud, sought not to gain fishermen by orators, but gained an Emperor by a fisherman. Great was Cyprian the pleader, but Peter the fisherman was before him. (Ev. ii. 17.) It might move enquiry, why John relates that near Jordan, not in Galilee, Andrew followed the Lord with another whose name he does not mention; and again, that Peter received that name from the Lord. Whereas the other three Evangelists write that they were call d rom their fishing, sufficiently agreeing with one another, especially Matthew and Mark; Luke not naming Andrew, who is however understood to have been in the same vessel with him. There is a further seeming discrepancy, that in Luke it is to Peter only that it is said, Henceforth thou shalt catch men; Matthew and Mark write that it was said to both. As to the different account in John, it should be carefully considered, and it will be found that it is a different time, place, and calling that is there spoken of. For Peter and Andrew had not so seen Jesus at the Jordan that they adhered inseparably ever after, but so as only to have known who He was, and wondering at Him to have gone their way. Perhaps he is returning back to something he had omitted, for he proceeds without marking any difference of time, As he walked by the sea of Galilee. It may be further asked, how Matthew and Mark relate that He called them separately two and two, when Luke relates that James and John being partners of Peter were called as it were to aid him, and bringing their barks to land followed Christ. We may then understand that the narrative of Luke relates to a prior time, after which they returned to their fishing as usual. For it had not been said to Peter that he should no more catch fishes, as he did do so again after the resurrection, but that he should catch men. Again, at a time after this happened that call of which Matthew and Mark speak; for they draw their ships to land to follow Him, not as careful to return again, but only anxious to follow Him when He bids them.