曾子曰:“吾日三省吾身:为人谋而不忠乎?与朋友交而不信乎?传不习乎?”
——《论语·学而》 RgPI+XEexrxhyWSq7OjfgDnObyV7h2x0SadPNgqDW6Sb9BI2WNlPYQC47JEt4vce