"It's not enough to be able to lie with a straight face; anybody with enough gall to raise on a busted flush can do that. The first way to lie artistically is to tell the truth - but not all of it. The second way involves telling the truth, too, but is harder: Tell the exact truth and maybe all of it but tell it so unconvincingly that your listener is sure you are lying."

"Love" is a that condition in which the happiness of another person is essential to your own...Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy."

"Belief gets in the way of learning."

"Harshaw had the arrogant humility of the man who has learned so much that he is aware of his own ignorance and he saw no point in 'measurements' when he did not know what he was measuring."

"But one way or another competing and weeding takes place . . . or a race goes downhill."

"I'm always suspicious of disinterested interest."

"It seems to me that any law that is not enforced and can't be enforced weakens all other laws."

"Heinlein's Rules for Writers - Rule One: You Must Write. Rule Two: Finish What Your Start. Rule Three: You Must Refrain From Rewriting, Except to Editorial Order. Rule Four: You Must Put Your Story on the Market. Rule Five: You Must Keep it on the Market until it has Sold."

"The instinct to survive is human nature itself, and every aspect of our personalities derives from it. Anything that conflicts with the survival instinct acts sooner or later to eliminate the individual and thereby fails to show up in future generations. . . . A scientifically verifiable theory of morals must be rooted in the individual's instinct to survive--and nowhere else!--and must correctly describe the hierarchy of survival, note the motivations at each level, and resolve all conflicts.We have such a theory now; we can solve any moral problem, on any level. Self-interest, love of family, duty to country, responsibility toward the human race . . . .The basis of all morality is duty, a concept with the same relation to group that self-interest has to individual."

"Every citizen is free to perform any act which does not hamper the equal freedom of another. No law shall forbid the performance of any act, which does not damage the physical or economic welfare of any other person."

"Do you know your Bible?''Uh, not very well.''It merits study, it contains very practical advice for most emergencies."

"I'm not feisty. But when you're as small as I am and female if you don't stand up for your rights, you're sure to be pushed around by big, hairy, smelly men with delusions about male superiority."

"He had learned that close-held secrets could often be cracked by going all the way to the top and there making himself unbearably unpleasant. He knew that such twisting of the tiger's tail was dangerous, for he understood the psychopathology of great power."

"Sick cultures show a complex of symptoms such as you have named...but a dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot."

"For millennia philosophers and saints have tried to reason out a logical scheme for the universe... until Hilda came along and demonstrated that the universe is not logical but whimsical, its structure depending solely on the dreams and nightmares of non-logical dreamers."