"The fundamental problem is that we do not know enough to do a good job."

"The universe is a strange and wonderful place, and we are only beginning to understand it."

"The more you know, the more you realize you don't know."

"I remember my friend Johnny von Neumann used to say, 'with four parameters I can fit an elephant and with five I can make him wiggle his trunk.'"

"We are like children who have found a new toy. We do not know what to do with it, but we are playing with it."