Matthew 5:13 (AMP)
You are the salt of the earth, but if salt has lost its taste (its strength, its quality), how can its saltness be restored? It is not good for anything any longer but to be thrown out and trodden underfoot by men.
Salt is good when it is strong and fresh. Its purpose is to season and preserve. When salt looses the foundation of its purpose it is good for nothing. Jesus said we are the salt of the earth, not the salt of heaven. The earth needs our salty not heaven. We are to influence the world and persuade people with the Good News. When your life crosses the path of other lives they should be able to taste the flavor of God on you. The words you speak and the way you behave should be so salty and seasoned with grace, the other person instantly becomes hunger and thirty for God.
There is nothing more gross than to taste something that should have a great flavor but when you take a bite it taste so bland and its texture is so rough you promptly spit it out.
So stay salty and bring a refreshing flavor to those you come in contact with everyday.