成功不是幸福的关键。幸福才是成功的关键。如果你热爱你所做的事情，你就会成功。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.