God cannot give us a happiness and peace apart from Himself, because it is not there.
 C. S. Lewis, Mere Christianity (1952). copy citation

add
Author C. S. Lewis
Source Mere Christianity
Topic happiness peace
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 Himself is the fuel our spirits were designed to burn, or the food our spirits were designed to feed on. There is no other. That is why it is just no good asking God to make us happy in our own way without bothering about religion. God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing. That is the key to history. Terrific energy is expended—civilisations are built up—excellent institutions devised; but each time something goes wrong. Some fatal flaw always brings the selfish and cruel people to the top and it all slides back into misery and ruin.” source