To this action
the warning words of the Divine Teacher fittingly apply: "He who enters not by the door into the sheepfold, but climbs up another way, is a thief and a robber" (John 10:1.). The sheep indeed know the true shepherd's voice.
"But a stranger they will not follow, but will flee from him, because they do not know the voice of strangers" (John 10:4-5.).
It does not escape Us that those who thus withdraw from obedience put forward a practice which was licit in previous centuries in order to justify themselves with regard
to those functions which they have, alas, unrighteously assumed. Yet everyone sees that it is the overthrow of all Ecclesiastical Discipline if in any way at all it is lawful for anyone to restore arrangements
which are not valid any longer since the Supreme Authority of the Church has long ago Decreed otherwise. They assuredly in no sense excuse their way of acting by appealing to another custom, and they indisputably prove that
they follow this line deliberately in order to escape from the discipline which now prevails and which they ought to be obeying.
mean that Discipline which has been established not only for China and the regions recently enlightened by the light of the Gospel, but for the whole Church--a Discipline which takes its sanction from that Universal and Supreme Power of caring
for, ruling and governing which Our Lord granted to the Successors in the Office of St. Peter the Apostle. [...]