I realized that a methane-oxygen rocket engine could achieve a specific impulse greater than 380.

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.

If you are born on this planet, we want to make sure you get the kind of education you actually deserve.

Silvio, I gotta go, find out something only dead men know.

Sleep just gives the ego a little time out. It has to stay strong in order to be something that it isn't.

Gonna travel, gonna travel wild and free I'm gonna pack my bags because this great big world is calling me

Teachers are expected to reach unattainable goals with inadequate tools. The miracle is that at times they accomplish this impossible task.

You would never understand, Kim. You think I'm normal; you wish I was.

I'm often moved by the circumstances around some of my characters, but I don't think I've actually cried watching myself.

There is a time, when passing through a light, that you walk in your own shadow.

I think it is time for all babies to let us know who they want for president.

I think there is a time, if I can say this; there is a time in a message where you might just tell a story to give your audience a break.