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. If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell.
This is one of the ten commandments. Do not commit adultery.
Committing adultery means that either the man or woman who are lawfully married is having sexual relations with another person. In the bible, God does not tolerate this behavior.
Adultery as sin is for both men and women. Jesus is telling us here that adultery runs deeper than just the physical act of it. Even if we commit adultery in our hearts by just looking and thinking about it. We are committing a sin. That’s why we need to ask for forgiveness and not ever do it again. Adultery breaks up families and marriages. When a man and women are married under God they become one flesh until death do them part. They become one unit. Jesus is telling us here that adultery disappoints God. Jesus is telling us that it is better to remove the thing from your body that is causing you to sin than being thrown into hell for eternity.
I believe this is a metaphor, that you must not take likely. Jesus is giving us a clear message of the severity of the punishment if we do not ask for forgiveness nor lead a righteous life.