Your most unhappy customers are your greatest source of learning.

激励和惩罚都是超级反应。

Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.

The power of words lies in their ability to evoke emotions.

最成功的人是那些擅长B计划的人。

追求数学真理需要直觉和严谨。

我不是低语，我是呼喊。