Luke 11:33-36 - Light And Darkness
33 "No one after lighting a lamp puts it in a secret place or under a basket, but on a stand, that those who come in may see the light. 34 Your eye is the lamp of your body. When your eye is good, your whole body also is full of light. But when it is bad, your body also is full of darkness. 35 Therefore be careful that the light in you is not darkness. 36 If then your whole body is full of light, having no part dark, it will be completely lighted, as when the bright shining of a lamp gives you light."