A great novel is one that refuses to be reduced to a single meaning.

2016年：贝索斯致股东信《每天都要像创业的第一天那样》

The only way to change behavior is through manipulation of reinforcement contingencies.

道德的目的是教你，不是受苦和死亡，而是享受自己和生活。

I would say that in the long run probably Communist China is likely to be in more of an expansionist phase than Soviet Russia...In their tactics, the Chinese Communists are probably the greater menace;