The only way to do great work is to love what you do.

The study of intelligence must be grounded in the study of symbol systems.

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

Surround yourself with people who challenge and inspire you.

永远不要停止学习，因为世界永远不会停止变化。

质量不是一种行为，而是一种习惯。

【译文】爱好学习的人如同禾苗稻谷一样都是有用的，不爱学习的人则像蒿草一样没有什么用处，只配当柴火来烧。