The principal effect of the progress of society is to increase the quantity of wealth, and the power of distributing it.

I'm not a star in my own eyes. I'm just a person.

预测未来的最好方法就是创造未来。

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

I am so clever that sometimes I don’t understand a single word of what I am saying.