Matthew 5: 13-16
Salt and light
13 “You are the salt of the earth. But if salt loses its salinity, how will it become salty again? Nothing is good except being thrown and trampled underfoot by people. 14 You are the light of the world. The city on top of the hill cannot be hidden. 15 Nor do people light a lamp and put it under a basket. Instead, they put it on a candlestick and lit it for everyone in the house. 16 In the same way, let your light shine before men, so that they may see the good things you do and praise your Father who is in heaven.