Here is what I preached on Sunday. It's the salt and light passage from Matthew 5. As salty Christians, we can fuction as a healing, preserving, and melting presence in the world. There was an episode of Seinfeld a few years back where Kramer has a part in a Woody Allen film. His only line: "These pretzels are making me thirsty!"
My prayer is that our neighbors, our co-workers, the other kids in school, and all the world see us living out our faith and say, "These Christians are making me thirsty!" Thirsty for God's justice and love, that is. Just a few verses before that salt and light stuff, Jesus says, "Blessed are those who hunger and thirst for righteousness..."