The worth of a psychological theory is measured by its usefulness.

唯一真正属于你的是你的态度。

The goal of economics is to understand how to allocate scarce resources in the most efficient way possible.

Education does not take root in the soul unless it goes deep.

We have three baskets for investing: yes, no, and too tough to understand.

人们哭泣比改变要容易得多。

一个好计划的最大敌人是梦想一个完美的计划。坚持好的计划。