Really great moral teachers never do introduce new moralities
 C. S. Lewis, Mere Christianity (1952). copy citation

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Author C. S. Lewis
Source Mere Christianity
Topic morality teachers
Date 1952
Language English
Reference
Note Adapted from a series of BBC radio talks made between 1942 and 1944
Weblink https://www.dacc.edu/assets/pdfs/PCM/merechristianitylewis.pdf

Context

“The first thing to get clear about Christian morality between man and man is that in this department Christ did not come to preach any brand new morality. The Golden Rule of the New Testament (Do as you would be done by) is a summing up of what every one, at bottom, had always known to be right. Really great moral teachers never do introduce new moralities: it is quacks and cranks who do that. As Dr Johnson said, ‘People need to be reminded more often than they need to be instructed.’ The real job of every moral teacher is to keep on bringing us back, time after time, to the old simple principles which we are all so anxious not to see;” source