It was the fearless preaching of John and Charles Wesley and George Whitfield that restored a conscience and brought people to a saving encounter with their God. To be sure, the Wesleys and Whitfield were mocked and vilified by the enemies of God. They were stoned and harassed and run out of town. But by their uncompromising witness, and that of their followers and lay preachers, England was saved and changed. This awakened conscience was responsible for the final prohibition of the slave trade in England.
Christians are the salt of the earth.
Their influence is wholesome and good and healing. Catholic Christians and Protestant Christians together. Yes, it is an embattled position, but it is right. And Christians can serve as the conscience of the nation today as they have in the past. While it is true that ancient peoples used salt as a preservative, a search of the Bible for this use of salt comes up empty.