Moralist

Mor·al·ist

Moralist

n.
  1. One who moralizes; one who teaches or animadverts upon the duties of life; a writer of essays intended to correct vice and inculcate moral duties.
  2. One who practices moral duties; a person who lives in conformity with moral rules; one of correct deportment and dealings with his fellow-creatures; -- sometimes used in contradistinction to one whose life is controlled by religious motives.
    The love (in the moralist of virtue, but in the Christian) of God himself.