The anarchic nature of the international system means that states must rely on self-help to ensure their survival.

成功不需要天才或远见，只需要坚持。

Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing.

A good book is a conversation between the author and the reader.

最深刻的真理往往是我们否认的那些。