This article deals with the phenomenon of doctrinal aberration and shows the most important cognitive, psychological, or social reasons and justifications that are required and needed for its rise and spread. The purpose of all that is to get to know a methodological treatment appropriate for those reasons and justifications, by trying to get to proved criteria and foundations of the true doctrine on the one hand, and by working to find theoretical and applicable ways and methods able to do away with the phenomenon of doctrinal deviation or limit its harms and bad consequences in our present-day life, on the other. This is the right beginning to diagnose and treat the problem of beliefs deviation.