"The secret of success is constancy to purpose."

"How much easier it is to be critical than to be correct."

"Books are fatal: they are the curse of the human race. Nine-tenths of existing books are nonsense, and the clever books are the refutation of that nonsense. The greatest misfortune that ever befell ma…"

"It is well-known what a middleman is; he is a man who bamboozles one party and plunders the other."

"We make our own fortune and call it destiny."