Matthew 5:13-14 (NLT)
You are the salt of the earth. But what good is salt if it has lost its flavor? …You are the light of the world—like a city on a hilltop that cannot be hidden.
At first glance, “salt” and “light” would seem to have nothing in common – but in Jesus’ day they were both critical to life. As the source for preserving food, people no longer had to depend on the daily availability of food, so it literally changed the economy of civilization. A light source was also imperative to survival; not only evil lurked in the darkness, but real physical dangers that could easily bring death. These everyday realities were well understood by the people, and Jesus conveyed their importance to the kingdom through His analogies. Christians of today are still critical to the world.