Thus it becomes apparent that “apostolic tradition” and “apostolic succession” define each other. The succession is the form of the tradition, and the tradition is the content of the succession. At the same time, the justification of both principles, which are really one, is to be found in this interconnection: the decisive element by which Catholic Christianity (whether Roman or Greek) is differentiated from that kind of Christian self-understanding which renounces the title “Catholic” and is happy