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》)

I examine myself three times a day: Have I done something unfaithful to others? Have I done something insincere to my friends? Have I reviewed what I’ve learned?;Each day I examine myself on three accounts:whether or not I am loyal to those in whose behalf I act;whether or not I am trustworthy in my dealings with friends;whether or not I practice what is imparted.(The Analects of Confucius)