Cast me into a dungeon, burn me at the stake, crown me king of kings, I can 'pursue happiness' as long as my brain lives - but neither gods nor saints, wise men nor subtle drugs, can ensure that I will catch it.

The Earth is just too small and fragile a basket for the human race to keep all its eggs in.

A girl's name ending in 'a' - that always suggests a 'C' cup.

The police of a state should never be stronger or better armed than the citizenry. An armed citizenry, willing to fight, is the foundation of civil freedom. That's a personal evaluation, of course.

Secrecy is the keystone to all tyranny. Not force, but secrecy and censorship. When any government or church for that matter, undertakes to say to its subjects, "This you may not read, this you must not know," the end result is tyranny and oppression, no matter how holy the motives. Mighty little force is needed to control a man who has been hoodwinked in this fashion; contrariwise, no amount of force can control a free man, whose mind is free. No, not the rack nor the atomic bomb, not anything. You can't conquer a free man; the most you can do is kill him.

Once you get to earth orbit, you're halfway to anywhere in the solar system.

Hit it! You have to hit it harder than that. Electrons are timid little things but notional; you have to let them know who’s boss.