The main theme dealt with in this paper is the "what" and "how" of the Shī‘īte extremism as one of the religio-ideological pathologies. Among the essential ways to resolve this type of issue is to acquire exact knowledge of its aspects, symbols, and manifestations, which in turn is dependant upon searching into its historical and cultural origins, requiring a study of the psychological, humanistic, and sociological backgrounds of the issue. However, with just a brief delving into the history of extremism, this writing touches upon the most important intellectual foundations and principles of non-heretical extremism and analyzes some of its basic pivots. Nevertheless, the author regards the best and the soundest way of judging this topic to be the examination of the effects and consequences resulting from this type of thinking, including antinomianism and unduly allegorical interpretations (ta’wīl).