If anyone sees his brother committing a sin not leading to death, he should ask God, who will give life to those who commit this kind of sin. There is a sin that leads to death; I am not saying he should ask regarding that sin.
16 If any man The Apostle extends still further the benefits of that faith which he has mentioned, so that our prayers may also avail for our brethren. It is a great thing, that as soon as we are oppressed, God kindly invites us to himself, and is ready to give us help; but that he hears us asking for others, is no small confirmation...
Christ emboldens us to petition God in all circumstances; through Him our supplications are admitted and accepted. Know that your petition is heard, and you know already that you have received what you desired. This assurance, grounded in the will of God, is as good as the answer itself.
AI summary
Commenting on 1 John 5:14-17
If anyone see his brother sin,.... Those who have such an interest at the throne of grace, and such boldness and freedom there, should make use of it for others, as well as themselves, and particularly for fallen believers; for a "brother"; not in a natural or civil sense, but in a spiritual sense, one that is judged to be born again, and belongs to...