Wired.com: How do you maintain your optimism?

Musk: Do I sound optimistic?

Wired.com: Yeah, you always do.

Musk: Optimism, pessimism, fuck that; we're going to make it happen. As God is my bloody witness, I'm hell-bent on making it work.

It comes from this this interview: http://www.wired.com/science/space/news/2008/08/musk_qa.

EDIT: adastra beat me. Ha.