"I hope you don’t think I’m trying to be manipulative. I’m not. I’m just trying to make sure that humanity has a future."

"You know, I'm not a fan of subsidies generally. I think the right answer is to have a carbon tax."

"Population collapse is the biggest threat to civilization."

"The rumor that I'm building a spaceship to get away from my problems is completely false. I have no problems."

"If something is important enough, even if the odds are against you, you should still do it."