A man can eat his dinner without understanding exactly how food nourishes him.
 C. S. Lewis, Mere Christianity (1952). copy citation

add
Author C. S. Lewis
Source Mere Christianity
Topic food understanding
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

“Indeed, if we found that we could fully understand it, that very fact would show it was not what it professes to be—the inconceivable, the uncreated, the thing from beyond nature, striking down into nature like lightning. You may ask what good it will be to us if we do not understand it. But that is easily answered. A man can eat his dinner without understanding exactly how food nourishes him. A man can accept what Christ has done without knowing how it works: indeed, he certainly would not know how it works until he has accepted it. We are told that Christ was killed for us, that His death has washed out our sins, and that by dying He disabled death itself.” source