“Ye are the salt of the earth.” – Matthew 5:13

Every particle of faith that there is in the world is a sort of purifier; wherever it comes, it has a tendency to kill that which is evil. In the spiritual sanitary arrangements which God made for this poor world, He put men of faith, and the faith of these men, into the midst of all this corruption, to help to keep other men’s souls alive, even as our Lord Jesus said to His disciples, “Ye are the salt of the earth.” The sweet perfumes that flow out from the flowers which God cultivates in the garden of His Church are scattering spiritual health and sanity all around. It is a blessed thing that the Lord has provided these sweet spices to overpower and counteract the unhealthy odours that float on every breeze. Think, then, dear friends, of the importance of being God’s fragrant flowers, which may yield perfumes that are delightful to Him, and that are blessed and healthful to our fellow-men. A man of faith and love in a church sweetens all his brethren. Give us but a few such in our midst, and there shall be no broken spiritual unity, there shall be no coldness and spiritual death; but all shall go well where these men of God are among us as a mighty influence for good. And, as to the ungodly around us, the continued existence in the earth of the Church of Christ is the hope of the world. The world that hates the Church knows not what it does, for it is hating its best friend. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2475.cfm