To understand is to invent.
对注意力的研究为了解大脑如何选择、整合和处理信息提供了一个窗口。
Your self-worth is determined by you. You don't have to depend on someone telling you who you are.
国家本质上是侵略性和扩张主义的,因为它们存在于一个无政府状态的国际体系中,没有更高的权威来约束它们。