Life can only be understood backwards; but it must be lived forwards.
在压力下保持冷静是成功的关键。
No individual has any right to come into the world and go out of it without leaving behind him distinct and legitimate reasons for having passed through it.
教师个人的范例，对于青年人的心灵，是任何东西都不可能代替的最有用的阳光。
States are rational actors that seek to maximize their power and security in an anarchic international system.