​The Order is dedicated to the principles of Charity, Unity, Fraternity and Patriotism. A First Degree exemplification ceremony, by which a man joins the Order, explicates the virtue of charity. He is then said to be a First Degree Knight of Columbus and after participating the subsequent degrees, each of which focuses on another virtue, rises to that status. Upon reaching the Third Degree a gentleman is considered a full member. Priests do not participate directly in Degree exemplifications as laymen do, but rather take the degree by observation. The first ritual handbook was printed in 1885 but contained only sections teaching Unity and Charity. Supreme Knight Mullen, along with primary ritual author Daniel Colwell, believed that the initiation ceremony should be held in three sections "in accord with the 'Trinity of Virtues, Charity, Unity, and Brotherly love.'" The third section, expounding Fraternity, was officially adopted in 1891.