God's purpose for each of us is to make a lasting impact. We are to have a spiritual influence in the lives of the people we meet. This is not an option; it is a command. And the power of our impact is going to be determined by the character of our life. The Bible uses a very common item to describe what our character should be - we are to be like salt.
Food is flavored by salt. We are to season the lives of the people around us in such as way that they will come to know Jesus Christ. Salt also creates thirst. When we enjoy a big slice of hickory smoked ham for breakfast, we need a glass of water to go with it! When we are at work or among friends, people notice our joy and contentment and desire to have those things for themselves. Their heart thirsts for God.
Salt has unique healing properties. One treatment for a sore throat is to dissolve salt in warm water and gargle with the soothing solution. In the same way, we can be a healing element in the lives of others. Take a moment to listen to people's hurts, and you will have their attention. Then you can share with them the truth that heals a broken heart.
Salt loses flavor when it becomes mixed with impurities. In other words, when we let sin into our life, we lessen the strength our witness. So to preserve the power of our "saltiness," we must guard the way we live. Then our impact can be strong and lasting.