I still have my [flight] license and I can still pass a flight physical.

Too many people, when they get old, think that they have to live by the calendar.

I think a mentor gets a lot of satisfaction in a couple of ways. They're doing something constructive, so they feel good about that. And when they see the results of this, with the young people they're working with, it's very, very rewarding.

To sit back and let fate play its hand out and never influence it is not the way man was meant to operate.

There is still no cure for the common birthday.

If we could do something that enhances the body's immune system here on Earth, it would be a tremendous step forward in the fight against disease and cancer and other things.

I am a stranger. I come in peace. Take me to your leader and there will be a massive reward for you in eternity.