All wrongdoing is sin, but there is sin that does not lead to death.
In context
15And if we know that he hears us—whatever we ask—we know that we have what we have asked of him. 16If anyone sees a brother or sister committing a sin that does not lead to death, he should pray, and God will give that person life. This is for anyone whose sin does not lead to death. There is a sin that leads to death; I am not saying he should pray about that. 17All wrongdoing is sin, but there is sin that does not lead to death. 18We know that no one who is born of God keeps on sinning; the One who was born of God keeps him safe, and the evil one cannot touch him. 19We know that we are from God, and that the whole world lies in the power of the evil one.
