Zengzi said: "I have to examine myself three times every day: Have I been unfaithful in my plans for others? Have I not trusted my friends in my dealings? Have I not learned to pass them on?"

Translation:

Zengzi said: "I reflect on myself in three aspects every day: Am I not conscientious enough in helping others? Am I not honest enough in dealing with friends? Have I reviewed the knowledge taught by the teacher?"