There is solemn satisfaction in doing the best you can for eight billion people. Perhaps their lives have no cosmic significance, but they have feelings. They can hurt.

The best thing about space travel is that it made it possible to go elsewhere.

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 death rate is the same for us as for anybody ... one person, one death, sooner or later.

I was no fool; I was aware that when another man is too anxious to force money on one, it is time to examine the cards, for there is almost certainly something illegal, or dangerous, or both, involved in the matter.

Self awareness is NOT just a bunch of amino acids bumping together.

Take big bites. Anything worth doing is worth overdoing.