For the eyes of the world now look into space, to the moon and to the planets beyond, and we have vowed that we shall not see it governed by a hostile flag of conquest, but by a banner of freedom and peace.

Behavior, as such, is not to be regarded as a mere chain of muscular contractions, but rather as a purposive and cognitive affair.

I'm a catalyst for change... You can't be an outsider and be successful over 30 years without leaving a certain amount of scar tissue around the place.

I never look back, I always look forward.

The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.

在科学中最令人兴奋的短语，预示着新发现的，不是“我找到了！”而是“这有点奇怪……”