The real pleasure of one's life is the devotion to a great objective of one's consideration.

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

For four wicked centuries the world has dreamed this foolish dream of efficiency; and the end is not yet. But the end will come.

The reasonable man adapts himself to the world; the unreasonable one persists to adapt the world to himself. Therefore all progress depends on the unreasonable man.

My main reason for adopting literature as a profession was that, as the author is never seen by his clients, he need not dress respectably.

The notion that inspiration is something that happened thousands of years ago, and was then finished and done with. . . the theory that God retired from business at that period and has not been heard from since, is as silly as it is blasphemous.

Patriotism is your conviction that this country is superior to all others because you were born in it.