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The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
"Children need to know that it's okay to be different."
我们有责任为子孙后代留下一个比我们发现时更好的地球。
A mathematician's work is never done; there are always more problems to solve.
战争不是解决问题的手段,只是表明问题的失败。