Persistence is very important. You should not give up unless you are forced to give up.

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.

I'm learning as I go. I don't know everything. I never had anybody to look at, nobody ever taught me, and where I'm from I didn't have any famous role models.

There never was any heart truly great and generous, that was not also tender and compassionate.

I've never stolen anything in my life, except maybe a couple hearts here and there.

Legends that endure in the future...were events that took place in the distant past.

He took a deep, shuddering breath. "Okay. I said it, it's out there. And I am fine now. So let's move on, shall we? What's the plan?

Ol' Shoot from the Lip," we call him.

It's the suppression of the word that gives it the power, the violence, the viciousness.

Poor human reason, when it trusts in itself, substitutes the strangest absurdities for the highest divine concepts

The wisdom of the Bible writers is more than human; the prophecies proclaim a Supreme Ruler who, though inhabiting all space, deigns to speak through the hearts and minds and tongues of His children.