Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

国家是理性的行为者，在无政府状态的国际体系中寻求最大化其权力和安全。

The only way to be free is to serve.

Never underestimate the power of a single idea to transform the world.

You may not control all the events that happen to you, but you can decide not to be reduced by them.

"Poverty is not just a lack of money; it's a lack of hope."