We should not have assumed that a political space station could be built.
I never got good at predicting what millions of people will suddenly decide is rational.
In challenging a kzin, a simple scream of rage is sufficient. You scream and you leap.
I'm not predicting; I just love playing with superconductors.
The dinosaurs became extinct because they didn't have a space program.
The best advice I was ever given was on my twenty-first birthday when my father said, Son, here's a million dollars. Don't lose it.