Luke 11:33-36 - Light And Darkness
33 And no man, having lit a lamp, puts it in a concealed place, nor under the bushel, but on the lampstand, so that those who enter in may see the light. 34 The lamp of thy body is the eye. Therefore, when thine eye is sound, thy whole body is also bright, but when it is bad, thy body is also dark. 35 Watch therefore the light in thee not be darkness. 36 If therefore thy whole body is bright, not having any part dark, the whole will be bright, as when the lamp illuminates thee by the radiance.