If I had to live my life over again, I would live it as a trader of goods.

The best way to cheer yourself up is to try to cheer somebody else up.

I believe in working hard and staying true to who you are.

心理学研究的正确方向是行为的预测和控制。

We have to continually be jumping off cliffs and developing our wings on the way down.

Beware of the Turing tar-pit in which everything is possible but nothing of interest is easy.

书籍是最安静、最恒久的朋友；它们是最易接近、最明智的顾问，也是最耐心的老师。