Bede

And he prayed again, and the heaven gave rain, etc. Therefore, he prayed once and before and after, and this one Elijah obtained such great and mighty things; how much more, then, is the frequent prayer of many righteous people worth? But lest our frailty should tremble, thinking that it cannot do similar things to such a great prophet, who deserved to be taken up to heaven in a fiery chariot, the blessed James, intending to speak about his prayer, thus began: Elijah was a man like us, subject to suffering. For he was a man, although second to none in virtue, like us in the origin of the flesh, subject to suffering as we are, both in the frailty of the mind and the flesh. For he showed that he was frail in the flesh by seeking sustenance from the widow at Zarephath. And because he was also subject to the suffering of the mind, he showed it when, after waters were returned to the earth and the prophets and priests of idols were slain, he fled through the deserts, terrified by the threats of a single woman. But how great it is to pray for the sick before the Lord, and to call them back to health as confessing their sins, he shows by adding:

My brothers, if anyone among you strays from the truth, etc. For, as in the earlier sections of this Epistle, our tongue is restrained from wicked or idle speech, it is now shown what we should especially speak at the end. Therefore, we are commanded to pray and sing psalms to the Lord whenever we are struck by adversities. Likewise, we must confess our sins to one another and pray for each other, so that we may be saved, showing as much care as we can for the health of our neighbors, not only their temporal but rather their eternal health. For just as it is of great reward to save a body destined to die, how much more meritorious is it to save a soul destined to live forever in the heavenly homeland? It should be noted that some codices have: "He will save his own soul from death." And from the ambiguous Greek, it can also be rightly interpreted this way. Indeed, whoever corrects a stray person thereby secures for themselves greater joys of celestial life. He says, "He will save his own soul from death and will cover a multitude of sins." He who converts a sinner from error hides his sins from the view of the inner Judge by the superposition of a better life; and he also covers his own failings, in whatever ways he has erred, from the sight of Him who sees all things by caring for his neighbor, according to the Psalmist: "Blessed are those whose iniquities are forgiven, and whose sins are covered" (Psalm 31). And Blessed James, urging this, does not forget what he said earlier: "Do not become many teachers, my brothers" (James 3). For there, he removes the imperfect from the office of teaching, which they sought out of pride. Here, however, he instructs those who are well-prepared on what they ought to do for the salvation of their neighbors out of fraternal love. For what a teacher is said to do here, elsewhere charity is remembered to do, according to Blessed Peter the apostle: "Because charity covers a multitude of sins" (1 Peter 4). Nor should it be overlooked that this conversion of the erring is often accomplished not only by speaking but also frequently by acting well. For if anyone shows good examples of action to their neighbors, even without speaking, and converts them to works of alms, hospitality, or other virtues they had neglected, they indeed perform the office of a teacher and will receive a certain reward from the merciful Judge for the salvation of the brother they corrected.