Matthew 5:13-16

13Ye are the salt of the earth: but if the salt have lost its savor, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out and trodden under foot of men. 14Ye are the light of the world. A city set on a hill cannot be hid. 15Neither do men light a lamp, and put it under the bushel, but on the stand; and it shineth unto all that are in the house. 16Even so let your light shine before men; that they may see your good works, and glorify your Father who is in heaven.