[malakhi]

21:25 And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.

Um, this is a proof-text for the inability of the Bible to be all-inclusive.

That is correct.

Stating that there is more that was revealed to the Apostles than what was written down.

No, it doesn't say that. It says "so many other things that Jesus did", not "so many other things that Jesus secretly taught the apostles".

this revelation is guarded by the authority of the Church.

A pretty substantial leap.

[OLD REGGIE]

(SD) this revelation is guarded by the authority of the Church.

A pretty substantial leap.

Yes, but necessary to explain new dogma.