You can make a good living from soothsaying but not from truthsaying.

In every man there is something of all men.

Above all things expand the frontiers of science: without this the rest counts for nothing.

To do just the opposite is also a form of imitation.

A writer who wishes to be read by posterity must not be averse to putting hints which might give rise to whole books, or ideas for learned discussions, in some corner of a chapter so that one should think he can afford to throw them away by the thousand.

Man can acquire accomplishments or he can become an animal, whichever he wants. God makes the animals, man makes himself.

There is something in our minds like sunshine and the weather, which is not under our control. When I write, the best things come to me from I know not where.