I never write "metropolis" for seven cents when I can write "city" and get paid the same.

Of all the animals, man is the only one that is cruel. He is the only one that inflicts pain for the pleasure of doing it.

I'm the only person who has ever found the right way to build an autobiography.

Explore. Dream. Discover.

Make your vocation your vacation. That is the secret to success.

In religion and politics people’s beliefs and convictions are in almost every case gotten at second-hand, and without examination, from authorities who have not themselves examined the questions at issue but have taken them at second-hand from other non-examiners, whose opinions about them were not worth a brass farthing.

And what is a man without energy? Nothing - nothing at all.