Matthew 5:27-30

Lust
v.27-28 Adultery is an offense that violates the 10 commandments (Ex 20:14) and breaks the marriage covenant (Mal 2:14). Jesus interprets it for us by showing that looking at a woman with lustful intent in your heart is the same as having committed adultery.
v.29-30 Even things of great value should be given up if they are causing you to sin. Your right eye or your hand, if they cause you to sin, should be cut off. It is better to go to heaven and be short an eye than to go to hell with two eyes.

Read Matthew 5:27-30