I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.

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.

Building a business is like creating a picture & striving to be picture perfect in everything you do.

We eat junk because it's cheap and it lights up the pleasure centers of our brain. And we do drugs because it's an effective way to feel good or escape something.

I cannot do it. I cannot bear it. I cannot go back to what I was here. I cannot stand at her side and watch another take her. I am not that strong or that good.

...if I only knew how much longer we had to put up with each other's company, I'd start counting the days.

Man, in the collective sense, is the hero of science. Man, in the collective sense, is the hero of Earth.

As anyone who has recently seen PG-13 movies knows, the level of violence in them has increased to the point of making the Motion Picture Association of America's voluntary rating system meaningless.

Let no man, in whatever rank or superiority, control your mind and tell you what to do

The climax of terror is reached when the police state begins to devour its own children, when yesterday's executioner becomes today's victim.

Everything that's fun in life is dangerous. Horse races, for instance, are very dangerous. But attempt to design a safe horse and the result is a cow ... It is impossible to be alive and safe.

I need the reality of other people, work, to fulfill myself. Must never become a mere mother and housewife.