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

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.

Life is too short for long-term grudges.

People aren't nice, people aren't nice, you should know that by now.

Remember this, posting pictures are like speaking words, you cannot take them back.

I do not think much of ages. People are people. What does it matter how old or young they are? It is a category, and I do not like categories. It is a sort of pigeonhole or a label.

Beware of allowing a tactless word, a rebuttal, a rejection to obliterate the whole sky

Find what you love, because greatness is based on great gifts. If you love something, you can count on the fact that you are genetically gifted at it.

I've always had great independence on everything I've done. Nobody's ever told me not to do anything.

They have called Operation Iraqi Freedom a war of choice that isn't part of the real war on terror. Someone should tell that to al Qaeda.

I'm always sorry when pleasant things end. Something still pleasanter may come after, but you can never be sure.

The proof of spiritual maturity is not how pure you are but awareness of your impurity. That very awareness opens the door to grace.

I would be loath to speak ill of any person who I do not know deserves it, but I am afraid he is an attorney.