"I do not, therefore, say that the word "progress" is unmeaning; I say it is unmeaning without the previous definition…"

"There is no such thing on earth as an uninteresting subject; the only thing that can exist is an uninterested person."

"He says, "Nothing endures, nothing is precise and certain (except the mind of a pedant).... Being indeed!—there is no…"

"A man can understand astronomy only by being an astronomer; he can understand entomology only by being an entomologis…"

"Whistler could produce art; and in so far he was a great man. But he could not forget art; and in so far he was only …"

"It is difficult to attain a high ideal; consequently, it is almost impossible to persuade ourselves that we have atta…"

"The word 'heresy' not only means no longer being wrong; it practically means being clear-headed and courageous. The w…"

"It is foolish, generally speaking, for a philosopher to set fire to another philosopher in Smithfield Market because …"

"At any innocent tea-table we may easily hear a man say, "Life is not worth living." We regard it as we regard the sta…"

"As enunciated today, 'progress' is simply a comparative of which we have not settled the superlative."