States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.
音乐可以改变世界,因为它可以改变人的思想。
A coragem não é a ausência do medo, mas a vitória sobre ele.
Failure is interesting—it’s part of making progress. You never learn from success, but you do learn from failure.
我们应该追随一切似乎可能的,避免一切似乎不可能的。