I have long held the opinion that the amount of noise that anyone can bear undisturbed stands in inverse proportion to his mental capacity and therefore be regarded as a pretty fair measure of it.
Arthur SchopenhauerGenius and madness have something in common: both live in a world that is different from that which exists for everyone else.
Arthur SchopenhauerA book can never be anything more than the impression of its authorโs thoughts. The value of these thoughts lies either in the matter about which he has thought, or in the form in which he develops his matter โ that is to say, what he has thought about it.
Arthur SchopenhauerJust as the largest library, badly arranged, is not so useful as a very moderate one that is well arranged, so the greatest amount of knowledge, if not elaborated by our own thoughts, is worth much less than a far smaller volume that has been abundantly and repeatedly thought over.
Arthur Schopenhauer