There are two things that kill a genius - a fatal disease and contentment.

History repeats itself. That's one of the things wrong with history.

If a man is happy in America, it is considered he is doing something wrong.

Some false representations contravene the law; some do not. ... The sensibilities of no two men are the same. Some would refuse to sell property without carefully explaining all about its merits and defects, and putting themselves in the purchasers' place and inquiring if he himself would buy under the circumstances. But such men never would be prosperous merchants.

I feel as I always have, that the earth is the home and the only home of man, and I am convinced that whatever he is to get out of his existence he must get while he is here.

In this dilemma they evolved the theory of natural rights. If 'natural rights' means anything it means that the individual rights are to be determined by the conduct of Nature. But Nature knows nothing about rights in the sense of human conception.

Physical deformity, calls forth our charity. But the infinite misfortune of moral deformity calls forth nothing but hatred and vengeance.