Luke 11:33-36 - Light And Darkness
33 "No one after lighting a lamp puts it in a cellar or under a basket, but on a stand, so that those who enter may see the light. 34 Your eye is the lamp of your body. When your eye is healthy, your whole body is full of light, but when it is bad, your body is full of darkness. 35 Therefore be careful lest the light in you be darkness. 36 If then your whole body is full of light, having no part dark, it will be wholly bright, as when a lamp with its rays gives you light."