Matthew 5:27-28 "You have heard that it was said, `Do not commit adultery.' But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart." This scripture is saying that if you have thought it, that you have already sinned in your heart! When we are trying to allow God to cleanse us, we have to understand this concept. This is not just limited to sexual sin, any time you are envious or jealous you allow yourself to begin down this path. The more you dwell on and fantasize about some one the more obsessed you can become. Before you may even realize it, you have perverted something that could have been good into a stronghold of sin. We must all examine our hearts and purge ourselves of these things and continually pray for God’s strength and wisdom in dealing with these issues. Through constant prayer and self examination, God can heal us, we have to simply be willing to hear him.