You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete.

The true business of people should be to go back to school and think about whatever it was they were thinking about before somebody came along and told them they had to earn a living.

Those who play with the devil's toys will be brought by degrees to wield his sword.

The most important thing about Spaceship Earth - an instruction book didn't come with it.

Nature is trying very hard to make us succeed, but nature does not depend on us. We are not the only experiment.

I have great hope for tomorrow. My hope lies in three things-truth, youth, and love.

Every time man makes a new experiment he always learns more. He cannot learn less.