8 Thus, and for these reasons, by the vote of the whole people, not in the evil fashion which has since prevailed, nor by means of bloodshed and oppression, but in an apostolic and spiritual manner, he is led up to the throne of Saint Mark, to succeed him in piety, no less than in office; in the latter indeed at a great distance from him, in the former, which is the genuine right of succession, following him closely. For unity in doctrine deserves unity in office; and a rival teacher sets up a rival throne; the one is a successor in reality, the other but in name. For it is not the intruder, but he whose rights are intruded upon, who is the successor, not the lawbreaker, but the lawfully appointed, not the man of contrary opinions, but the man of the same faith; if this is not what we mean by successor, he succeeds in the same sense as disease to health, darkness to light, storm to calm, and frenzy to sound sense.
Source: Orations (New Advent)