人生中唯一真正的失败是不忠于自己所知的最好。
The only real failure in life is not to be true to the best one knows.
The mind will ever be unstable that has only prejudices to rest on.
The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.
不是知识，而是学习的行为；不是占有，而是到达的过程，才能带来最大的快乐。
互联网是教育的强大工具，但它不能替代教师。