Jesus, A.D. 32
“You are the salt of the earth; but if the salt has become tasteless, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled under foot by men.” (Matthew 5:13)
Salt restrains the process of corruption.
“In the days before refrigeration, sailors who took meat on long voyages used salt as a preservative. The process of corruption was already at work before the meat was salted. Salting did not abolish the corruption, but it held it in check for the duration of the voyage, so that the sailors could continue to eat the meat long after it would otherwise have become inedible.
Our presence on the earth as Christ’s disciples operates like the salt in the meat. The process of sin’s corruption is already at work. This is manifested in every area of human activity–moral, relgious, social, political. We cannot abolish the corruption which is already there, but we can hold it in check long enough for God’ purposes of grace and mercy to be fully worked out.”
—Shaping History Through Prayer and Fasting, 19.