You are the salt of the earth. You are the light of the world.
Q: What is our purpose as Christians?
A: We are the Salt and Light of the world.
Salt has been and still is used for many purposes including being a seasoning, a preservative, a disinfectant and as a unit of exchange.
Our world is full of decay and corruption because of sin. As Christians we must act as moral preservatives, preventing and hindering the spiritual decline and moral decay in the world.