"An authoritative mission to teach is absolutely necessary, a man-given mission is not authoritative. Hence any concept of Apostolicity that excludes authoritative union with the Apostolic mission robs the ministry of its Divine character. Apostolicity, or Apostolic succession, then, means that the mission conferred by Jesus Christ upon the Apostles must pass from then to their legitimate successors, in an unbroken line, until the end of the world."