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Hold yourself responsible for a higher standard than anybody else expects of you. Never excuse yourself.
True happiness comes from within, not from external achievements or possessions.
对称性不仅是自然的一种属性,而且是寻找物理定律的指导原则。
【译文】用心算计别人反而时时出错,退一步考虑事情路子就会很宽。