The Greek word denotes, primarily, a straight rod; hence a rule or standard, by a reference to which the rectitude of opinions or actions may be decided. In the latter sense it is used in Galatians 6:16 Philippians 3:16 . In the same sense it was used by the Greek fathers. As the standard to which they sought to appeal on all questions was the will of God contained in the Scriptures of the Old and New Testaments, they came naturally to apply this term to the collective body of those writings, and to speak of them as the canon or rule. Canon is also equivalent to a list of catalogue, in which are inserted those books which contain the inspired rule of faith.
In order to establish the canon of Scripture, it must be shown that all the books are of divine authority; that they are entire and incorrupt; that it is complete without addition from any foreign source; and that the whole of the books for which divine authority can be proved are included. See BIBLE .