人心是天渊。心之本体，无所不该，原是一个天。只为私欲障碍，则天之本体失了。心之理无穷尽，原是一个渊。只为私欲窒塞，则渊之本体失了。
译文：人心就像天空和深渊。心的本体，无所不包，原本就是一个天。只是因为被私欲所阻碍，那么天的本体就丧失了。心中的道理无穷无尽，原本就是一个深渊。只是因为被私欲堵塞，那么深渊的本体就丧失了。
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