“You are the salt of the earth, but if salt has lost its taste, how shall its saltiness be restored? It is no longer good for anything except to be thrown out and trampled under people’s feet. You are the light of the world. A city set on a hill cannot be hidden. Nor do people light a lamp and put it under a basket, but on a stand, and it gives light to all in the house. In the same way, let your light shine before others, so that they may see your good works and give glory to your Father who is in heaven” (Matthew 5:13-16).
Salt and light are both good. The chief value of salt two thousand years ago was that salt preserved food. Jesus suggests that his people have value by preserving this world and enlightening it.
Jesus also warns that we are capable of failure. Salt in his day was not bought pure from stores. Salt came with impurities. As Jesus remarks, if the true salt leaches out of the mixture that is labeled salt, what remains is only gravel. When a lamp is lit and then hidden, that lamp also is useless. God wants us to be useful, not useless. He wants us to benefit the world.
These verses about flavorless salt and hidden light are reminders that Christians can lose their faith. The teaching “once saved; always saved” is not Biblical. (See Ezekiel 33:12-13 and Hebrews 10:26-31.) The Holy Spirit works through the Word of God to call us to faith and also to keep us in the one true faith; but when people spurn the Word of God, they starve and destroy the gift of faith. God does not want Christians to live in fear that we might someday lose our faith. The Bible frequently speaks of election—that our salvation depends upon God’s infinite power, not on our weak human powers. But Jesus calls one sin unforgiveable: the sin against the Holy Spirit. When the Spirit calls a person to faith and that person refuses the Spirit’s call, that person has rejected the gift of salvation by grace through faith.
Dead people cannot make themselves alive. Resurrection depends upon a miracle of God. Living people can damage and destroy their lives. We were dead in our trespasses and sins. Through the Word, the Spirit calls us to life. Now we retain our saltiness and keep our light unhidden as we continue to draw strength and power from the Word of God.
We are already blessed. The rewards earned by Jesus belong to us as a gift. We do not have to try to earn them by being good. Why, then, should we bother to do good things? We want to be good so we can be useful to God and can benefit the people around us. As Paul wrote, “We are God’s workmanship, created in Christ Jesus to do good works” (Ephesians 2:10). Now that we have been rescued from our sins, we are able to accomplish God’s plan for our lives. We also want people to praise the God who has saved us. When we harm others, we bring shame to the name of our Father. If we, as Christians, have a reputation for doing what is wrong, we bring shame to the name of Christ.
Instead, we want to glorify God. We want to be the people we were meant to be. Therefore, we study God’s commandments. We see the things we are told not to do—for example, we are not to murder, we are not to commit adultery, we are not to break our oaths. We see the things we should do—we should give to the needy, we should pray, we should fast. All these things we do, not for ourselves, but to bring glory to God.
Other religions teach the same positive and negative commandments. People all over the world value the same virtues Christians value, because the Law of God is written in their hearts. Mohandas Gandhi agreed with the ethical teachings of Jesus, but Gandhi remained Hindu. He chose not to be a Christian; he did not see Jesus as the unique Son of God or as a Savior. Since the ethical teachings are consistent throughout the religions of the world, we see that we cannot remain salt and light simply by doing the good things Jesus commands and not committing the sins he condemns.
We are not saved by our good works; we are saved by the grace of God. That is not permission to sin. Even though our good deeds do not earn us a place in the kingdom of heaven—even though nonChristians may equal or surpass us in doing good things—we still have a blessing. We belong to Jesus. Therefore, to bring honor to his name, we try to imitate him. To help other people in this world, we try to obey God’s commandments. To try to be the people we were created to be, we try to live up to the high standards of Jesus our Lord. J.