Our entire belief system can be summed up with - the Bible.
Jude referred to this body of teaching as "the faith" and said that it was "once for all delivered to the saints". (Jude 3) We believe that this "faith" has been revealed by God and preserved in complete form in the pages of the Bible.
Paul referred to these writings as "Scripture" and made the claim, "All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work." (2 Tim. 3:16-17)
We adhere to no more or no less than the Bible.