The greatest proof of our intellect is our ability to perceive our own limitations.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

种一棵树最好的时间是20年前，其次是现在。

Mental phenomena are best understood as bridges between environmental demands and organismic responses.

If you let yourself be undisciplined on the small things, you will probably be undisciplined on the large things as well.

成功的真正标准不仅仅是利润，还有我们给社会留下的积极影响。