Man is the only animals of which I am thoroughly and cravenly afraid.

The policy of letting things alone, in the practical sense that the Government should never interfere with business or go into business itself, is called Laisser-faire by economists and politicians. It has broken down so completely in practice that it is now discredited; but it was all the fashion in politics a hundred years ago, and is still influentially advocated by men of business and their backers who naturally would like to be allowed to make money as they please without regard to the interest of the public.

It seems as though every time you learn something new you have to give up something.

The longer I live, the more convinced am I that this planet is used by other planets as a lunatic asylum.

Democracy is a device that insures we shall be governed no better than we deserve.

[Chess] is a foolish expedient for making idle people believe they are doing something very clever, when they are only wasting their time.

It is not pleasure that makes life worth living. It is life that makes pleasure worth having.