Yen Yuan asked about perfect virtue. The Master said, "To subdue one's self and return to propriety, is perfect virtue. If a man can for one day subdue himself and return to propriety, an under heaven will ascribe perfect virtue to him. Is the practice of perfect virtue from a man himself, or is it from others?"Go here to read the introductory post to this serialized version of the Analects of Confucius.
Yen Yuan said, "I beg to ask the steps of that process." The Master replied, "Look not at what is contrary to propriety; listen not to what is contrary to propriety; speak not what is contrary to propriety; make no movement which is contrary to propriety." Yen Yuan then said, "Though I am deficient in intelligence and vigor, I will make it my business to practice this lesson."
~ James Legge translation via The Internet Classics Archive ~