“No es que los oráculos hayan dejado de hablar, sino que los hombres han dejado de escucharlos.”

“Când ai de facut o lucrare, nu te gândi mereu la întregimea ei; executa fragmentul pe care-l ai în fata, si când ai terminat cu el, mergi mai departe”

“Wenn ein Buch und ein Kopf zusammenstoßen und es klingt hohl, ist das allemal im Buch?”

“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.”

“To make a vow is a greater sin than to break one.”

“Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.”