“Par. 7 ...However it has never been possible to prove oneself a Catholic by affirming those statements of the faith which one accepts and keeping silence on those doctrines which one decides not to profess. But without exception, all doctrines which the Church proposes must be accepted, as the history of the Church at all times bears witness. 8. ...For any man to be able to prove his Catholic faith and affirm that he is truly a Catholic, he must be able to convince the Apostolic See of this. For this See is predominant and with it the faithful of the whole Church should agree.”  -Pope Pius IX, Quartus Supra, January 6, 1873