“You are the salt of the earth. But what good is salt if it has lost its flavor? Can you make it salty again? It will be known out and trampled underfoot as worthless” Matthew 5:13 (NLT)

Salt is use for sweetening food. Longman defines it as a natural white mineral that is added to food to make it taste better or preserve it.

Therefore if the bible refers to you a Christian as salt of the earth, it connotes that you are created to make the earth a better place or to help preserve the earth...Read more[http://www.ackcity.net/you-are-salt-of-the-world]