If you are a nice person—if virtue comes easily to you—beware! Much is expected from those to whom much is given. If you mistake for your own merits what are really God’s gifts to you through nature, and if you are contented with simply being nice, you are still a rebel: and all those gifts will only make your fall more terrible, your corruption more complicated, your bad example more disastrous.
 C. S. Lewis, Mere Christianity (1952). copy citation

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Author C. S. Lewis
Source Mere Christianity
Topic corruption virtue
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

“They are the ‘awful set’ He goes about with—and of course the Pharisees say still, as they said from the first, ‘If there were anything in Christianity those people would not be Christians.’ There is either a warning or an encouragement here for every one of us. If you are a nice person—if virtue comes easily to you—beware! Much is expected from those to whom much is given. If you mistake for your own merits what are really God’s gifts to you through nature, and if you are contented with simply being nice, you are still a rebel: and all those gifts will only make your fall more terrible, your corruption more complicated, your bad example more disastrous. The Devil was an archangel once; his natural gifts were as far above yours as yours are above those of a chimpanzee. But if you are a poor creature—poisoned by a wretched upbringing in some house full of vulgar jealousies and senseless quarrels—saddled, by no choice of your own, with some loathsome sexual perversion—nagged day in and day out by an inferiority complex that makes you snap at your best friends—do not despair.” source