There is no credulity so eager and blind as the credulity of covetousness, which, in its universal extent, measures the moral misery and the intellectual destitution of mankind.

Mathematics commands all my respect, but I have no use for engines.

The last thing a woman will consent to in a man whom she loves, or on whom she simply depends, is want of courage.

Youth is insolent; it is its right - its necessity; it has got to assert itself, and all assertion in this world of doubts is a defiance, is an insolence.

Everything belonged to him--but that was a trifle. The thing to know was what he belonged to, how many powers of darkness claimed him for their own.

We live as we dream - alone. While the dream disappears, the life continues painfully.

Do not talk to me of Archimedes' lever. He was an absent-minded person with a mathematical imagination. Mathematics commands my respect, but I have no use for engines. Give me the right word and the right accent and I will move the world.