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

Close the door. Write with no one looking over your shoulder. Don't try to figure out what other people want to hear from you; figure out what you have to say. It's the one and only thing you have to offer.

商业的成功来自于理解人，而不仅仅是产品。