"What is the use of studying philosophy if all that it does for you is to enable you to talk with some plausibility about some abstruse questions of logic, etc., and if it does not improve your thinkin…"

"A good simile refreshes the intellect."

"A philosophical problem has the form: 'I don't know my way about.'"

"Genius is courage."

"What we are supplying are really remarks on the natural history of human beings; we are not contributing curiosities however, but observations which no one has doubted, but which have escaped remark o…"