Luke 11:34-36

RKJNT(i) 34 The light of the body is the eye: therefore when your eye is good, your whole body also is full of light; but when your eye is bad, your body also is full of darkness. 35 Take heed, then, that the light which is within you is not darkness. 36 Therefore, if your whole body is full of light, having no dark part in it, it shall be fully illuminated, as when the bright shining of a lamp gives you light.