"You can't create a culture of excellence by tolerating mediocrity."

"I think the internet is a super powerful tool, and it's a great way to communicate."

"If you buy a ticket to Mars, you're buying a one-way ticket. There's no return. It's a very difficult journey. You may die. You may die on the way there. You may die after you get there. You'll probab…"

"You're going to get some pretty intense experiences if you try to make something happen."

"I think we're at the dawn of a new age of space exploration."