No apostasy. Before the curse of the reformation we had ONE Church charged with teaching ONE truth and with infallibility authority to put together as the authentic Word of God in the New Testament. The books in the bible did not fall from the skies and self-assemble themselves. That infallible authority was exercised by the early Church fathers, some of whom were contemporaries of St. John the Evangelists who wrote John 21:25.
The infallibility of the Catholic Church then in AD 382 when the canonical texts were confirmed by the Synod of Rome, did not evaporate eleven centuries later with the curse of the Reformation. These kind of “attacks” on the Church have gone on before, so keep at it folks, since the gates of Hell shall never prevail against it.
In the meantime learned Lutheran theologians keep converting to Catholicism in droves.
Was it the Catholic, the Eastern Orthodox, the Non-Chalcedonian, or the Non-Ephesian (Nestorian)?
There are SEVEN letters to SEVEN churches in Revelation.