[FreedomCalls]

There is no Scripture supporting your assumption that all theology be taught formally in Scripture.

"Sola Scriptura" - it is the fundamental basis of Protestant faith.

Proverbs 30:5-6
(5) Every word of God is pure;
He is a shield to those who put their trust in Him.
(6) Do not add to His words,
Lest He rebuke you, and you be found a liar.

[khnyny]

Here you go, you might learn something.

http://www.ewtn.com/faith/teachings/maryc3.htm

[adiaireton8]

The Catholic Church completely affirms that verse, and every verse in the Bible, a Bible which Protestants got from the Catholic Church. But that verse does not teach 'sola scriptura'. We do not add to His words. We simply recognize that many of His words were not written down in Scripture; they were passed down orally from the Apostles to the bishops.

-A8