Learning without thought means labour lost ; thought without learning is perilous.
他有一句名言，“学而不思则罔，思而不学则殆”。这句话告诉我们学习和思考的重要性。
One of his famous sayings, "He who learns but does not think is lost; he who thinks but does not learn is in danger," tells us the importance of learning and thinking.
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