Did you know it is possible to commit sin without even doing an act? Jesus said in Matthew 5:28, “Anyone who looks at a woman lustfully has already committed adultery with her in his heart.” So many people have trouble with that verse, because they realize it is possible to commit what we call “mental adultery,” or adultery in a person’s heart. The difference between a tempting thought and a sinful desire is you could look at somebody of the opposite sex and say that person is nice-looking, but if you entertain thoughts about entering into a sexual relationship with that person, you begin to fantasize it and visualize it, then you can step over the line and you can commit adultery in your heart with that person, but it all began with a tempting thought.