“The first condition of happiness is a clear conscience.”

- David O. McKay, (Gospel Ideals, Salt Lake City: The Improvement Era, 1953, p. 498.), as quoted by Elder Ezra Taft Benson Of the Council of the Twelve in "A Message to the Rising Generation," General Conference, Oct 1977
http://www.lds.org/general-conference/1977/10/a-message-to-the-rising-generation?lang=eng