According to Jesus why should one cut their eye out and throw it away?

ANSWER

If your eye causes you to sin.

Matthew 5 :

(27) “You have heard that it was said, ‘You shall not commit adultery.’ (28) But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart. (29) If your right eye causes you to stumble, 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. (30)
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