The devil is in the details

[1] The idiom "God is in the details" has been attributed to a number of people, most notably to the German-born architect Ludwig Mies van der Rohe (1886–1969) by The New York Times in Mies's 1969 obituary; however, it is generally accepted not to have originated with him.

According to Christopher Johnson, Der liebe Gott steckt im Detail was the subtitle of a seminar Warburg taught at the University of Hamburg in the winter of 1925-26.

[3] A French version of the saying, "Le bon Dieu est dans le détail" (literally "the good God is in the detail") is generally attributed to Gustave Flaubert (1821–1880).

[1] The expression "the devil is in the details" is found in a 1963 history of post-war European integration.

[9] When referring to the finer points of legislation, the former US House Speaker Nancy Pelosi observed, "The devil and the angels are in the details.