Psychological theories must pass the test of practical experience.

The role of business is to produce products and services that make people's lives better—while using fewer resources—and to act lawfully and with integrity.

We are all prisoners of our own perceptions.

I’ve had my best years after fifty. Age is just a number—it’s your attitude that counts. 

正是通过观察和反思的力量，人们才能找到方法。所以我们必须不断地挖掘和钻研。

你不需要成为摇滚明星才能改变世界。