"The world is a hospital for incurables."

"The more intelligence one has, the more pain one suffers."

"Buying books would be a good thing if one could also buy the time to read them in: but as a rule the purchase of books is mistaken for the appropriation of their contents."

"Optimism is a truly wicked way of thinking."

"A last trick is to become personal, insulting and rude as soon as you perceive that your opponent has the upper hand. In becoming personal you leave the subject altogether, and turn your attack on the…"