Like every living thing its prime characteristic is a blind, unreasoned instinct to survive.

Money is truthful. If a man speaks of his honor, make him pay cash.

I took up writing because I needed money. And I continued to write because it's safer than stealing and easier than working.

Must be yearning deep in human heart to stop other people from doing as they please.

Yes, Boss?' Dorcas, the last twenty or thirty years I've been a worthless, no-good parasite.' She yawned again. 'Everybody knows that.' Nevermind the flattery. There comes a time in every man's life when he has to stop being sensible--a time to stand up and be counted--strike a blow for liberty--smite the wicked.' Ummm...' So quit yawning, the time has come.' She glanced down. 'Maybe I had better get dressed.

Remember this: once the human race is established on more than one planet and especially, in more than one solar system, there is no way now imaginable to kill off the human race.

Luck is a tag given by the mediocre to account for the accomplishments of genius.