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The spiritual life is the only life worth living.
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.
The best way to understand something is to try to change it.
理解密码学的关键在于理解它不仅仅是关于保守秘密,而是关于管理信任。