成功不是幸福的关键。幸福是成功的关键。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.
你今天感受到的痛苦将成为你明天感受到的力量。
The structure of the international system, not the intentions of individual states, is the primary determinant of state behavior.
Quality is never an accident; it's the result of intention and effort.