"You are the salt of the earth. But if salt becomes tasteless, by what will it be made salty? It is good for nothing any longer except to be thrown outside [and] trampled under foot by people.
References for Matthew 5:13
You are the light of the world. A city located on top of a hill cannot be hidden,
nor do they light a lamp and place it under a basket, but on a lampstand, and it shines on all those in the house.
In the [same] way let your light shine before people, so that they can see your good works and glorify your Father who is in heaven.