如果你可以不去寻找别人的认同，那么你的力量就是无穷的。

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

成功投资的关键是拥有纪律性的心态。

Positive emotions are not trivial luxuries, but instead may be critical necessities for optimal functioning.

The purpose of mental activity is successful living.

The history of the world is the history of the few.