Chapter 12, Part 1 - Confucius

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?"

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 ~

Go here to read the introductory post to this serialized version of the Analects of Confucius.