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因果关系的阶梯有三个梯级:观察、行动和想象。
The ladder of causation has three rungs: seeing, doing, and imagining.
True forest stewardship means leaving some trees - and some profits - for those who come after us.
The function of prayer is not to influence God, but rather to change the nature of the one who prays.
成功不是终点,失败也不是致命的:继续前进的勇气才是最重要的。