For Pride is spiritual cancer: it eats up the very possibility of love, or contentment, or even common sense.
 C. S. Lewis, Mere Christianity (1952). copy citation

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Author C. S. Lewis
Source Mere Christianity
Topic contentment love
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

“He is perfectly content to see you becoming chaste and brave and self-controlled provided, all the time, he is setting up in you the Dictatorship of Pride—just as he would be quite content to see your chilblains cured if he was allowed, in return, to give you cancer. For Pride is spiritual cancer: it eats up the very possibility of love, or contentment, or even common sense. Before leaving this subject I must guard against some possible misunderstandings:
(1) Pleasure in being praised is not Pride. The child who is patted on the back for doing a lesson well, the woman whose beauty is praised by her lover, the saved soul to whom Christ says ‘Well done,’ are pleased and ought to be.” source