I think one of the best definitions of sin is anything we do that separates us from God. When we talk about sin we find that humans make very little of sin and God makes so much of it. People joke about it, even brag about their sins. Much of our entertainment glorifies sinful life choices.
God hates sin (Proverbs 6:16ff.). God says that the “wages of sin is death” (Romans 6:23). God says that sin is a very serious matter.
A fellow named Willie was deep in debt and was thinking of committing suicide.