Mathematics has not a foot to stand upon which is not purely metaphysical.

It is most absurdly said, in popular language, of any man, that he is disguised in liquor; for, on the contrary, most men are disguised by sobriety.

A promise is binding in the inverse ratio of the numbers to whom it is made.

There is first the literature of KNOWLEDGE, and secondly, the literature of POWER. The function of the first is -- to teach; the function of the second is -- to move.

As is the inventor of murder, and the father of art, Cain must have been a man of first-rate genius.

Fierce sectarianism breeds fierce latitudinarianism.

Solitude, though it may be silent as light, is like light, the mightiest of agencies; for solitude is essential to man. All men come into this world alone and leave it alone.