“The thoughts written on the walls of madhouses by their inmates might be worth publicizing.”

“I would give something to know for precisely whom the deeds were really done, of which it is publicly stated they were done 'for the Fatherland'.”

“Perhaps in time the so-called Dark Ages will be thought of as including our own.”

“One might call habit a moral friction: something that prevents the mind from gliding over things but connects it with them and makes it hard for it to free itself from them.”

“If we thought more for ourselves we would have very many more bad books and very many more good ones.”

“To make clever people believe we are what we are not is in most instances harder than really to become what we want to seem to be.”

“Honest unaffected distrust of human abilities under all circumstances is the surest sign of strength of mind.”