Translation
If someone sees his brother sinning a sin which does not lead to death, he will ask, and He will give life to those committing a sin which does not lead to death. There is a sin which leads to death; I do not say he should ask about that.
Paraphrase
Here is an example: If one of you sees a brother in Christ committing a sin which does not by itself jeopardize his relationship with God (e.g. someone who has a heart for God but slips and yields to temptation), he should ask God to give that person greater spiritual vitality and God will indeed make available to that person what is needed for spiritual vitality so he can live victoriously and be rewarded with eternal life. However, there is a sinful condition which directly jeopardizes one’s relationship with God, [and if it continues,] will produce the consequence of eternal punishment. I will not tell you to invest your time praying for all such cases because there are times when the best thing to do is to send a strong message through excommunication.