"Mystery creates wonder and wonder is the basis of man's desire to understand."

"I don't feel like I'm a hero."

"Before we can conquer space, we must first conquer ourselves."

"I was always a little uncomfortable with the 'first' part, because I was simply the one who was chosen to take that step."

"I guess we all like to be recognized not for one piece of fireworks but for the ledger of our daily work."