Matthew 5:14-16 (NASB)
14 You are the light of the world. A city set on a hill cannot be hidden;
15 nor does anyone light a lamp and put it under a basket, but on the
lampstand, and it gives light to all who are in the house. 16 Let your
light shine before men in such a way that they may see your good works,
and glorify your Father who is in heaven.