"The life of an individual is a constant struggle, and not merely a metaphorical one against want or boredom, but also an actual struggle against other people."

"In order to live a life that is truly worth living, one must at some point become thoroughly disgusted with it."

"The brain may be regarded as a kind of parasite of the organism, a pensioner, as it were, who dwells with the body."

"The less a man thinks, the more he talks."

"Sleep is the interest we have to pay on the capital which is called health."