Matthew 5:13

Verse 13. Ye are the salt of the earth. Salt renders food pleasant and palatable, and preserves from putrefaction. So Christians, by their lives and instructions, are to keep the world from entire moral corruption. By bringing down, by their prayers, the blessing of God, and by their influence and example, they save the world from universal vice and crime. Salt have lost his savour. That is, if it has become insipid, tasteless, or have lost its preserving properties. The salt used in this country is a chemical compound--muriate of soda-- and if the saltness were lost, or it were to lose its savour, there would be nothing remaining. It enters into the very nature of the substance.