《淮南子·人间训》
大凡人们要做某件事，都要先用他的智慧思考揣度一番，然后才根据思考的结论定下计划谋略，实践下来的结果，有人得利有人受害，这就是智者和蠢人的差别所在。
凡人之举事，莫不先以其知规虑揣度，而后敢以定谋，其或利或害，此愚智之所以异也。
Generally speaking, when people want to do something, they have to think and ponder it carefully with his wisdom, and then make plans and strategies according to the conclusions of the thinking. In the practice, some people benefit and some people suffer -- this is the difference between a wise man and a stupid person.