You are the salt of the earth; but if the salt has become tasteless, how can it be made salty again ? It is no longer good for anything, except to be thrown out and trampled underfoot by people.
You are the light of the world. A city set on a hill cannot be hidden; nor do people light a lamp and put it under a basket, but on the lampstand, and it gives light to all who are in the house. Your light must shine before people in such a way that they may see your good works, and glorify your Father who is in heaven.
Matthew 5:13-16