Robert Anson Heinlein (7 July 1907 – 8 May 1988) was one of the most popular, influential, and controversial authors of science fiction of the 20th Century.
Correct morality can only be derived from what man is — not from what do-gooders and well-meaning aunt Nellies would like him to be.
Son, people do odd things for money, but they’ll do still more drastic things for power over money. Anybody sittin’ close to a billion credits is in danger; it’s like keeping a pet rattlesnake.
The best things in history are accomplished by people who get tired of being shoved around.