You want to be extra rigorous about making the best possible thing you can. Find everything that's wrong with it and fix it.

Failure is an option here. If things are not failing, you are not innovating enough.

When something is important enough, you do it even if the odds are not in your favor.

People should pursue what they're passionate about. That will make them happier than pretty much anything else.

I think it is possible for ordinary people to choose to be extraordinary.

I'm extremely confident that solar will be at least a plurality of power, and most likely a majority... in less than 20 years.

Constantly seek criticism. A well thought out critique of what you're doing is as valuable as gold

Optimism, pessimism, f**k that; we're going to make it happen. As God is my bloody witness, I'm hell-bent on making it work.

I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

Mars is the only place in the solar system where it's possible for life to become multi-planetarian.

My mentality is that of a samurai. I would rather commit seppuku than fail.

A railroad station? That was sort of a primitive airport, only you didn't have to take a cab 20 miles out of town to reach it.

I don't want to be married just to be married. I can't think of anything lonelier than spending the rest of my life with someone I can't talk to, or worse, someone I can't be silent with.

Overworking leads to exhaustion.

When other people ask me, 'What gives you the right to suggest standards for others?', my answer is, 'If I don't, someone else, perhaps less qualified, will.

Today just 400 Americans have more wealth than half of all Americans combined.

The labs were happy that I was brave enough to attempt to program it and the $5 million computer was left entirely to my use. I was their human guinea pig.

I am convinced that companies should put staff first, customers second and shareholders third - ultimately that's in the best interest of customers and shareholders.

In the second century A.D. the Roman Emperor Marcus Aurelius may have best defined pantheism when he wrote, “Everything is interwoven, and the web is holy.

Fixing your heartbreak by getting into another relationship is not the way to live your life - you need to live it on your terms for a while.

Tolerance is another word for indifference.