Christ IS the Head of the Church (Col. 1:18). He gave HIS Authortity to the Apostes and His innnercircle, who were the first leaders of His Church. Make NO mistake - that leasdership IS successive - and it's not "against" the Word of God.
In Acts 1, we read that the Aposles and over 100 others gather to elect a successor for Judas. In verse 20, Peter quotes the Psalms when he says:
"Let another take his office."
The Greek word used here for "office" is "Episkopay" (Bishopric). Matthias, who was chosen was a successor to Judas - not a mere "replacement". Verse 20 makes it CLEAR that Judas held an "office" - a Bishopric.
As we read in the following verses - Jesus gave these first leaders of His Church SUPREME earthly Authority - that WHATEVER THEY DECLARED on earth would also be declared in Heaven. That whoever listened to or rejected THEM - listened to or reject HIM and the Father.
Matt 16:18-19
And so I say to you, you are Peter (Kepha), and upon this rock (Kepha) I will build my church, and the gates of the netherworld shall not prevail against it.
I will give YOU the keys to the kingdom of heaven. WHATEVER YOU BIND on earth shall be bound in heaven; and WHATEVER YOU LOOSE on earth shall be loosed in heaven."
Matt. 18:15-18
"If your brother sins (against you), go and tell him his fault between you and him alone. If he listens to you, you have won over your brother.
If he does not listen, take one or two others along with you, so that 'every fact may be established on the testimony of two or three witnesses.'
If he refuses to listen to them, tell the CHURCH. If he refuses to listen even to the CHURCH, then treat him as you would a Gentile or a tax collector.
Amen, I say to you, WHATEVER YOU BIND on earth shall be bound in heaven, and WHATEVER YOU LOOSE on earth shall be loosed in heaven.
John 16:12-15
“I have much more to tell you, but you cannot bear it now.
But when he comes, the Spirit of truth, he will guide you to ALL truth. He will not speak on his own, but he will speak what he hears, and will declare to YOU the things that are coming.
He will glorify me, because he will TAKE from what is MINE and declare it to YOU.
Everything that the Father has is MINE; for this reason I told you that he will TAKE from what is MINE and declare it to YOU.
John 20:21-23
Jesus said to them again, “Peace be with you. As the Father has sent ME, so I send YOU.” And when he had said this, he breathed on them and said to them, “Receive the holy Spirit. Whose sins YOU FORGIVE are forgiven them, and whose sins YOU RETAIN are retained.”
2 Thess 2:15
"Stand firm and hold fast to the Traditions you were taught, whether by an ORAL STATEMENT or by a LETTER from us."
Luke 10:16
Whoever listens to YOU listens to ME. Whoever rejects YOU rejects ME. And whoever rejects ME rejects the ONE who sent ME."