The pursuit of power is the primary goal of states in the international system.
如果你借了什么东西，试着在归还的时候把它变得比你借到时的状态更好。清洁它、打磨它、填充它。
生命太短暂，不能浪费时间恨任何人。
Leadership is about inspiring others to believe in something bigger than themselves.
The elegance of a proof is as important as its correctness.