Who said "The most dangerous madness is that of ideas."?

This quote is attributed to Denis Diderot.

The most dangerous madness is that of ideas. - Denis Diderot

"The most dangerous madness is that of ideas."

Denis Diderot Philosophy

Philosopher Writer French 1713–1784

"The world is for those who think."

"Man will never be free until the last king is strangled with the entrails of the last priest."

"Nothing can be believed unless it is seen."

"I am convinced the mind can be developed to the point where success is inevitable."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."