]READ the Scriptures. Teachers are held accountable. NONE is exempt from such because self alone declares that self alone is (the rubric of the RCC).
The Church is not self appointed. Jesus started a Church, not multiple denominations. Unity in the fullness of Truth is not possible in multiple contradictory denominations.
Matt 16
18And I tell you that you are Peter, and on this rock
I will build my church, and the gates of Hades will not overcome it.
John 20
21Again Jesus said, "Peace be with you!
As the Father has sent me, I am sending you." 22And with that he breathed on them and said, "Receive the Holy Spirit. 23If you forgive anyone his sins, they are forgiven; if you do not forgive them, they are not forgiven."
Matt 18
17If he refuses to listen to them, tell it to the church; and if he refuses to listen even to the church, treat him as you would a pagan or a tax collector.
The Church has authority because it was given authority by Jesus.
Acts 15
22Then the apostles and elders, with the whole church, decided to choose some of their own men and send them to Antioch with Paul and Barnabas. They chose Judas (called Barsabbas) and Silas, two men who were leaders among the brothers. 23With them they sent the following letter: The apostles and elders, your brothers, To the Gentile believers in Antioch, Syria and Cilicia: Greetings. 24We have heard that some went out from us without our authorization and disturbed you, troubling your minds by what they said.