Your passion in life should fit you exactly； but your purpose in life should exceed you. Work for something much larger than yourself.

The quality of your life is the quality of your relationships.

You take delight not in a city’s seven or seventy wonders, but in the answer it gives to a question of yours.

The thrill of discovery never gets old.

文化进化的研究必须考虑社会的内部动态和外部环境约束。

没有人分享的成功毫无意义。