Materials speak their own language; our job is to listen and interpret.
The unexamined life is not worth living.
爱护别人的人，别人也必定爱护他；有利于别人的人，别人也必定有利于他；憎恶别人的人，别人也必定憎恶他；伤害别人的人，别人也必定伤害他。
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.