Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? It is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men. Matthew 5:13
Salt is valued for its preservative properties; and when God calls His children salt, He would teach them that His purpose in making them the subjects of His grace is that they may become agents in saving others. The object of God in choosing a people before all the world was not only that He might adopt them as His sons and daughters, but that through them the world might receive the grace that bringeth salvation (Titus 2:11). When the Lord chose Abraham, it was not simply to be the special friend of God, but to be a medium of the peculiar privileges the Lord desired to bestow upon the nations. Jesus, in that last prayer with His disciples before His crucifixion, said, "For their sakes I sanctify Myself, that they also might be sanctified through the truth" (John 17:19). In like manner Christians who are purified through the truth will possess saving qualities that preserve the world from utter moral corruption.
Salt must be mingled with the substance to which it is added; it must penetrate and infuse in order to preserve. So it is through personal contact and association that men are reached by the saving power of the gospel....Personal influence is a power. We must come close to those whom we desire to benefit.
The savor of the salt represents the vital power of the Christian--the love of Jesus in the heart, the righteousness of Christ pervading the life. (Thoughts from the Mount of Blessing, 35, 36)
Reflection: Whether you have too little or too much salt, the taste is not good. This is an object lesson we all can understand. Allowing Christ to live through us keeps the salt content just right, we will be a blessing for those around us.