"Those who cannot cope with mathematics are at best, tolerable sub-humans who have learned to bathe, wear shoes and not make messes in the house."
- Robert Heinlein

Beware of altruism. It is based on self-deception, the root of all evil.
- Lazarus Long

To be matter of fact about the world is to blunder into fantasy -- and dull fantasy at that, as the real world is strange and wonderful.
- Robert Heinlein

Never worry about theory as long as the machinery does what it's supposed to do.
- Robert Heinlein

Women and cats will do as they please, and men and dogs should relax and get used to the idea.
- Robert Heinlein

"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."
- Robert Heinlein
(Lazarus Long in Time Enough For Love)