Luke 11:33-36

33But no one having lit a lamp sets it in secret, nor under the corn-measure, but on the lamp-stand, that they who enter in may see the light.

34The lamp of the body is thine eye: when thine eye is simple, thy whole body also is light; but when it is wicked, thy body also is dark.

35See therefore that the light which is in thee be not darkness.

36If therefore thy whole body [is] light, not having any part dark, it shall be all light as when the lamp lights thee with its brightness.