States are inherently aggressive and expansionist because they exist in an anarchic international system where there is no higher authority to keep them in check.
释义:早早成功的人未必能取得长久的成就,晚点成功的人也未必不能达到目标。因此,不能因为年轻就自满骄傲,也不能因为年老就自暴自弃。