"We may be living in a world where the future is already written, but we still have the power to change it."

"Any man whose errors take ten years to correct is quite a man."

"It is perfectly obvious that the whole world is going to hell. The only possible chance that it might not is that we do not attempt to prevent it from doing so."

"We have to find a way to reconcile our scientific progress with our moral responsibility."

"The secret of getting ahead is getting started."