與魔鬼戰鬥的人，應當小心自己不要成為魔鬼。當你遠遠凝視深淵時，深淵也在凝視你。

— 尼采

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勇者鬥惡龍，小心勇者變惡龍。

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As soon as men decide that all means are permitted to fight an evil, then their good becomes indistinguishable from the evil that they set out to destroy.

— Christopher Dawson

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2018.02.16 Friday ACHK