Testing leads to failure, and failure leads to understanding.

In 12 or 15 years, there will be routine, affordable space tourism not just in the U.S. but in a lot of countries.

Usually the wacky people have the breakthroughs. The smart people dont.

A NASA astronaut and a Russian cosmonaut can't be creative. He has to follow a predetermined detailed checklist written by an engineer and if he gets a little creative he'll never fly again.

I believe that research, that you can claim that you're doing research only if half of the people, and I'm talking about half of the experts, believe that the goal is impossible.

A true creator researches how to have confidence in nonsense.

NASA's myriad failures are in many ways the natural consequence of a catastrophic combination of bureaucracy, monopoly, and a calcifying aversion to the kind of risk necessary for innovation.

Everything looks nonsensical before it works.

Testing leads to failure, and failure leads to understanding

I have a hunch the most important reason we're going to space is not known now.

Look at the aerospace industry as it was just after the Kennedy talk. We were hiring like crazy. We were trying to get people graduated from college. Hey, you got to go to the program. We need you.

A man should be resigned to knowing himself a little better each day if he hasn't got the guts to put an end to his sniveling once and for all.

All crimes, all hatreds, all wars can be reduced to unhappiness.

What a sense of security in an old book which time has criticized for us!

A man can well afford to be as bold as brass, my good fellow, when he gets gold in exchange!

It's tough enough to have a relationship, and it hurts enough to have it not work.

It felt odd to be laughing during a firefight. Then again, if you can't laugh when you're about to die, when can you?

Time spent in honor of God for the salvation of souls is never badly spent.

What you want to do is innovate on your product and your business model, management structure is not where I would try and innovate.

New facts often trigger new ideas

A watch is the most essential part of a lecture.