“I have no place in my life for someone who is sure he can do everything.”

“Teach what you know, regardless of when you have learned it -- teach what you learned yesterday sagely, as if you have known it all your life, and teach what you have known for decades with enthusi...”

“I belong to a stupid nation that kill and murder their own people for language and religion, then they call it foreigners interference.”

“We still live with this unbelievable threat over our heads of nuclear war. I mean, are we stupid? Do we think that the nuclear threat has gone, that the nuclear destruction of the planet is not imm...”

“I failed first grade, which is my biggest problem. You always feel like a failure, like you're stupid.”

“Stupidity and wisdom meet in the same centre of sentiment and resolution, in the suffering of human accidents.”

“If this man had not twelve thousand a year, he would be a very stupid fellow.”

“There are only 2 paths to happiness in life. Utter Stupidity or Exceptional Wealth.”

“I can accept failure, everyone fails at something. But I can't accept not trying.”

“I was trying to be this person who is cool, eternally rocking.”

“That's what we want to do here at Johnson Space Center. I think what we have always brought to NASA and brought to the country is trying to push the boundaries, trying to go to the next level.”