Matthew 5: 13 - 16
13 "You are the salt of the earth; but if salt has lost its taste, how shall its saltness be restored? It is no longer good for anything except to be thrown out and trodden under foot by men.
14 "You are the light of the world. A city set on a hill cannot be hid.
15 Nor do men light a lamp and put it under a bushel, but on a stand, and it gives light to all in the house.
16 Let your light so shine before men, that they may see your good works and give glory to your Father who is in heaven.

EWTN