The Salt of the Earth
From expounding the meaning of the blessedness of those who are persecuted for the sake of Christ, Rev. Sang Ho Bae explores the distinct identity of Christian witness, describing the children of God as the salt of the earth:
You are the salt of the world (Matt. 5:13).
This statement is the declaration that most clearly reveals the identity and mission of a Christian. Salt is common, yet absolutely essential; without salt, food loses its taste and easily spoils. Jesus used that very salt as a metaphor to show what kind of existence a Christian must live out in the world. This means that a Christian is someone who exists for the world.
A Christian shows that he is already set apart from the world through the character revealed in the Beatitudes. A poor spirit, meekness, hunger and thirst for righteousness, mercy, a pure heart, and making peace—these qualities are not innate but are new traits given to a person who has been born again by the Holy Spirit. Thus, a Christian lives in the world yet walks in a direction different from the world.
A Christian is like a fish that lives in salty seawater yet does not become salty, and like a ship that floats on the sea yet does not allow the seawater to enter. He lives in the world, but he does not belong to the world. The early church father Diognetus said, “They live in every nation, but while they follow the laws of the land, they transcend those laws.” A Christian lives on this earth like a foreigner—different in culture, different in values, and different in the direction of life. Without this difference, one cannot be salt. Just as Jesus was different from the people of His time, His disciples must also be different.
However, not belonging to the world does not mean withdrawing from it. Jesus said, “You are the salt of the world,” which means, “You are the salt for the world.” In the Greek text, the word “you” is in an emphatic form, carrying the sense of "You alone are the salt.” Only Christians can be the salt for the world.
The greatest role of salt is to prevent decay. In ancient society, salt was the strongest preservative, and fish salted down would not rot. The words of Jesus can be heard this way: “If left alone, the world will rot. But because you are there, the world does not completely decay.” Matthew Henry said, “The prophets of the Old Testament were the salt of the land of Canaan, and the saints of the New Testament are the salt of the whole world.” The reason the world decays is not because the world is evil but because the salt fails to do its work. The corruption, disorder, and moral collapse of today’s society are not merely the world’s problem but also the responsibility of Christians. The early church, even amid the cruelty of Rome, cared for orphans and widows, practiced honesty and self-control, and became an unseen force that restrained the corruption of society. Their very existence was salt.
Another role of salt is to give flavor. The pleasures of the world are momentary, success is empty, and material things cannot fill the soul, but the gospel gives true meaning to life. A Christian brings good influence wherever he is. Wherever Joseph went, those around him were blessed because of him; his very presence was salt. Wherever a Christian is, conversations should change, the atmosphere should change, and values should change. C. S. Lewis said, “A Christian is someone who brings the fragrance of heaven into the world.” Just as salt is indispensable to the world, a Christian must become an indispensable presence in society.
A person who possesses the eight qualities of the Sermon on the Mount naturally fulfills the role of salt and light. From his life comes the taste of salt and the shining of light; when people are with him, their conscience is awakened, their hearts are purified, and the direction of their lives is set right.
The words “You are the salt of the world” are not merely a metaphor but a declaration that deeply awakens the identity and mission of a Christian. The darker the world becomes and the deeper the corruption grows, the more clearly the value of salt is revealed. Even today, the Lord sends us into the midst of the world and says, “You are the salt of the world.”
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