"You are the light of the world. A city that is set on a hill cannot be hidden. Nor do they light a lamp and put it under a basket, but on a lamp stand, and it gives light to all who are in the house."
Mt 5:14 & 15
"Let your light so shine before men, that they may see your good works and glorify your Father in heaven."
"The lamp of the body is the eye. If therefore your eye is good, your whole body will be full of light."
"Whatever I tell you in the dark, speak in the light; and what you hear in the ear, preach on the housetops."