Greetings ContraMundum,
Here is a quote from Wikipedia on your belief system:
Arguably, the most influential of them has been Article VI on the sufficiency of Scripture, which states that Scripture containeth all things necessary to salvation: so that whatsoever is not read therein, nor may be proved thereby, is not to be required of any man, that it should be believed as an article of the Faith, or be thought requisite or necessary to salvation.
Where ever Scripture is mentioned as follows:
Until I come, give attention to reading of Scripture, to encouragement, to teaching.
(1Ti 4:13 The Scriptures 1998+)
But you, stay in what you have learned and trusted, having known from whom you have learned, and that from a babe you have known the Set-apart Scriptures, which are able to make you wise for deliverance through belief in Messiah יהושע. All Scripture is breathed by Elohim and profitable for teaching, for reproof, for setting straight, for instruction in righteousness, that the man of Elohim might be fitted, equipped for every good work.
(2Ti 3:14-17 The Scriptures 1998+)
Tell me what this is refering to? Then I will tell you were much of the teachings you hold on to come from.