One may demand of me that I should seek truth, but not that I should find it.

[On doit exiger de moi que je cherche la vérité, mais non que je la trouve.]
 

Denis Diderot (1713-1784) French editor, philosopher

Pensées Philosophiques [Philosophical Thoughts], #29 (1746)

Alt. trans.: "I can be expected to look for truth but not to find it."