Success cannot be measured in wealth, fame or power, but by whether you have made a positive difference for others.

I make up my mind about whether I can trust someone within 60 seconds of meeting them

If we can just get young people to do the same as their fathers did, that is, wear condoms

We will be producing supersonic planes which will go far, far faster than Concordes. New York to Tokyo could be less than an hour. You could be traveling at 19,000 miles an hour orbitally.

The best advice I ever received? Simple: Have no regrets.

We're going where no one has gone before. There's no model to follow, nothing to copy. That is what makes this so exciting.

I'm a great believer that saying yes is a lot more fun than saying no.