The extension of life beyond Earth is the most important thing we can do as a species.

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.

Perseverance is the true beginning of a life of victory.

For impact, tell your true story -challenges, victory, all. Build hope by helping others find themselves by your story.

The world is like a mirror frown at it and it frowns at you. Smile and it smiles too.

INDIFFERENT, adj. Imperfectly sensible to distinctions among things.

The strength required for the vision of the most powerful reality is not only compatible with the most powerful strength for action, for monstrous action, for crime - it even presupposes it.

Its difficult to do something radically new, unless you are at the heart of a company.

In the memory of the dead all chronological differences are effaced.

I am really laid back and kind of go-with-the-flow, but I will never do anything that I don't believe in.

You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.

All good strategy eventually degenerates into work.