The devil is in the details
Even the grandest project depends on the success of the smallest components.
This version of the proverb often implies that the details might cause failure. A more positive version is “God is in the details,” a saying often attributed to the architect Le Corbusier.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.