In the German book Usability und UX kompakt by Michael Richter and Markus Flückiger (Springer, 2016, page 159), I found the following quote, which the authors attribute to Denis Diderot:
Die einen, so scheint mir, haben viele Werkzeuge und wenig Ideen; die anderen haben viele Ideen und gar keine Werkzeuge.
Some, it seems to me, have many tools and few ideas; (the) others have many ideas and no tools at all.
What is the exact source of this quote and what was the wording of the original version in French? The German Wikiquote page and the French Wikiquote page don't seem to list the quote. A search for
diderot outils idées "les uns" "les autres", but Diderot may have used a different word than "outils" for "tools".