If a wise man studies the science of the occult, his duty is not to laugh at everything, but to seek patiently, slowly, perseveringly, the truth that may be concealed in the night of these illusions.

Kant thought things, not because they were true, but because he was Kant.

I don’t see why the things we believe absolutely now shouldn’t be just as wrong as what they believed in the past.’‘Neither do I.’‘Then how can you believe anything at all?’‘I don’t know.

If my eyes show me what all my training assures me is impossible, I can only conclude that my eyes deceive me.

It is an illusion that youth is happy, an illusion of those who have lost it; but the young know they are wretched for they are full of the truthless ideals which have been instilled in them, and each time they come into contact with the real, they are bruised and wounded.

If truth is a value it is because it is true and not because it is brave to speak it.