《三略·下略》
战争是不吉祥的东西，天道是厌恶战争的。只有在迫不得已时进行战争，才是顺乎天道的。
夫兵者，不祥之器，天道恶之，不得已而用之，是天道也。
War is an inauspicious thing, and Heaven detests it. It is only when war becomes absolutely necessary that it is in accordance with the will of Heaven.