The main of faith, the ‘believer’ of every sort is necessarily a dependent man—such as cannot out of himself posit ends at all. The ‘believer’ does not belong to himself, he can be only a means, he has to be used, he needs someone who will use him. […] Conviction is the backbone of the man of conviction. Not to see many things, not to be impartial in anything, to be party through and through, to view all values from a strict and necessary perspective—this alone is the condition under which such a man exists at all. But he is thereby the antithesis, the antagonist of the truthful man—of truth.
Friedrich Nietzsche, The Anti-Christ