John Chrysostom
Why did the Evangelist not indicate the name of the other disciple? Some explain it by saying that this disciple who followed Christ was the very one who wrote about it. Others think differently, namely that he was not among the chosen disciples, while the Evangelist spoke only of the more notable persons. But what profit is there in learning this disciple's name, when even the names of the seventy-two disciples are not given? The same can be seen in Paul. "With him we have sent the brother," he says, "who is praised in all the churches for the Gospel" (2 Cor. 8:18). Andrew is mentioned for another reason also. What is that reason? It is so that, knowing how Simon and Andrew heard only, "Follow Me, and I will make you fishers of men" (Mt. 4:19), you may not doubt this extraordinary promise. I say this so that you may also know that the firstfruits of faith, even before Simon, had been laid by his brother.