Mathematics has not a foot to stand upon which is not purely metaphysical.
In many walks of life, a conscience is a more expensive encumbrance than a wife or a carriage.
Thou hast the keys of Paradise, oh, just, subtle, and mighty opium!
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.
Kings should disdain to die, and only disappear.
Often one's dear friend talks something which one scruples to call rigmarole.