Our world is in a mess, but Jesus Christ told us exactly how to change our world in the Sermon on the Mount, when He said to be salt of the earth and light of the world. Jesus told us what to be and what to do.
1. What you should be: salt and light. Why did Christ pick the illustration of salt and light? Salt is used as a preservative and to flavor food. Likewise, we should influence our world. Paul gave an example of this in 1 Corinthians 7:14, saying that the believer who remains married to an unbelieving spouse can influence them toward salvation. Light reveals and reflects. Likewise, we should reveal truth, glowing with the glory of God in our lives. Interestingly, Jesus said here, “You are the light of the world,” but in John 9:5, He said, “I am the light of the world.” This is no contradiction; Jesus is the source of the light, and we can merely reflect His light. We have no light within ourselves; we only get it when we are plugged into the power source through a relationship with Christ Himself.
2. What you should do: keep your saltiness and shine your brightness. Jesus said in this passage, that if salt loses its taste, it is no longer any good. A lot of Christians are sassy but not salty. We need to keep the saltiness but lose the sassiness. Jesus also says in this passage that nobody puts a lamp under a basket, but he puts it on a stand so everybody can see it. A wise person once said, “The best way to deal with change is to create the change.” Too many Christians are reactive instead of proactive. We have good news! We have hope! Spread it around and let it shine.
3. Why should we be salt and light: to glorify God. Jesus concludes by saying, “Let your light shine before men, so that they may see your good works and glorify your Father in heaven.” The reason for us to be salt and light is not so that others will look at us, but so that they will look at God.
Acts 17:6 says that the people in the city of Thessalonica were so stirred up about the influence of the Christians that they said, “These men who have turned the world upside down have come here, too!” The early Christians changed their world. So can we.