Good people know about both good and evil: bad people do not know about either.
 C. S. Lewis, Mere Christianity (1952). copy citation

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Author C. S. Lewis
Source Mere Christianity
Topic evil good
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

“You can see mistakes in arithmetic when your mind is working properly: while you are making them you cannot see them. You can understand the nature of drunkenness when you are sober, not when you are drunk. Good people know about both good and evil: bad people do not know about either. 5 SEXUAL MORALITY We must now consider Christian morality as regards sex, what Christians call the virtue of chastity. The Christian rule of chastity must not be confused with the social rule of ‘modesty’” source