“That faith makes blessed under certain circumstances, that blessedness does not make of a fixed idea a true idea, that faith moves no mountains but puts mountains where there are none: a quick walk through a madhouse enlightens one sufficiently about this.”
Sec. 51; often paraphrased as: "A casual stroll through the lunatic asylum shows that faith does not prove anything".
The Antichrist (1888)
Help us to complete the source, original and additional information
Friedrich Nietzsche 655
German philosopher, poet, composer, cultural critic, and cl… 1844–1900Related quotes

“If there is a faith which can move mountains, then it is a faith in one’s own strength.”
Wenn es einen Glauben gibt, der Berge versetzen kann, so ist es der Glaube an die eigene Kraft.
Source: Aphorisms (1880/1893), p. 22.

“What can stand against loyalty? It is the faith that moves mountains.”
Source: Midwinter (1923), Ch. X

Source: The Spiritual Life (1947), p. 32

"La logique et l'intuition dans la science mathématique et dans l'enseignement" [Logic and intuition in the science of mathematics and in teaching], L'enseignement mathématique (1899)
Context: The task of the educator is to make the child's spirit pass again where its forefathers have gone, moving rapidly through certain stages but suppressing none of them. In this regard, the history of science must be our guide.

Source: Zimbabwe: Gender Equality A Right (2010)