The true value of coal lies in how we extract and use it responsibly.

The knowledge that you have emerged wiser and stronger from setbacks means that you are, ever after, secure in your ability to survive. You will never truly know yourself, or the strength of your relationships, until both have been tested by adversity. Such knowledge is a true gift, for all that it is painfully won, and it has been worth more than any qualification I ever earned.

释义：福可能变成祸，祸也可能转为福，变化没有尽头。

诗人是打破沉默的人，是第一个说话的人，是敢于说话的人。

Mathematics teaches us to think logically and to approach problems systematically.

Life is so short, so beautiful. Don't be so serious about work. Enjoy the life.

心理学理论的价值是由其实用性衡量的。