All wrongdoing is sin, but there is sin that does not lead to death.
17 All unrighteousness This passage may be explained variously. If you take it adversatively, the sense would not be unsuitable, “Though all unrighteousness is sin, yet every sin is not unto death.” And equally suitable is another meaning, “As sin is every unrighteousness, hence it follows that every sin is not unto death.” Some take all unrighteousness for complete unrighteousness, as though the Apostle had...
Here we have, I. A privilege belonging to faith in Christ, namely, audience in prayer: This is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us, Jo1 5:14. The Lord Christ emboldens us to come to God in all circumstances, with all our supplications and requests. Through him our petitions are admitted and accepted of God.
Commenting on 1 John 5:14-17
All unrighteousness is sin,.... All unrighteousness against God or man is a sin against the law of God, and the wrath of God is revealed against it, and it is deserving of death; yet all unrighteousness is not unto death, as the sins of David, which were unrighteousness both to God and man, and yet they were put away, and he died not; Peter sinned...