Thematic Bible: What is the eye

Your eye is the lamp of the body. When your eye is sincere, your whole body is full of light also. But when it is evil, your body [is] dark also. Therefore pay careful attention [that] the light in you is not darkness! If therefore your whole body [is] full of light, not having any part dark, it will be completely full of light, as when the lamp with [its] light gives light to you."