Luke 11:34-36

Riverside(i) 34 The lamp of the body is the eye. When your eye is clear the whole body is lighted. But when it is bad, your body is dark. 35 Make sure that the light that is in you is not darkness. 36 If your body is all lighted up, not having any part dark, it will be all lighted as when the lamp lights you by its brilliance."