So then, let Christ speak through the Bible, not through Augustine, Aquinas, Tetzel or the Borgias.
Why?
Peter, and the apostles, and their successors sent by Christ!
Lk 10:16 He who hears you hears me, he who rejects you rejects me!
Jn 5:23
That all men should honour the Son, even as they honour the Father. He that honoureth not the Son honoureth not the Father which hath sent him.
John 13:20
Verily, verily, I say unto you, He that receiveth whomsoever I send receiveth me; and he that receiveth me receiveth him that sent me.
Jn 20:21-22
Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.
22 And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost:
Matt 28:19
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Disciples must be taught:
The apostles cannot teach error:
Jn 8:32
Jn 16:13
Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
Must receive the apostles and their successors
Jn 13:20
Verily, verily, I say unto you, He that receiveth whomsoever I send receiveth me; and he that receiveth me receiveth him that sent me.