The basic source of the one faith is the Holy Bible. The other sources are the sayings of the saints, the authenticated creeds of the holy councils, and what was recorded in the
Church books, especially the ritual books. All these are in accord with the Holy Bible and are called as a whole 'Church Tradition'.
The criterion by which we validate the accuracy of Tradition is the important condition that it complies with the Holy Bible. Our teacher St. Paul the Apostle says: "But even if we, or an angel from heaven, preach any other gospel to you than what we have preached to you, let him be accursed" (Gal.1: 8). He also says: "As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed" (Gal.1: 9).