语言是我们理解世界的唯一工具，但它总是不够用。
Language is the only tool we have to make sense of the world, and yet it is always inadequate.
在数学中，提出问题的艺术必须比解决问题更有价值。
Leadership is about creating more leaders, not more followers.
The anarchic nature of the international system compels states to prioritize their own survival above all else.
