In this profound analytical and comparative study, Hamdi Abdullah El-Sharkawy meticulously examines the intricate relationship between religious theory and practical application through the lens of Al-Qadi Abd al-Jabbar al-Mu'tazili. The book delves into the methodologies and insights of this revered Islamic theologian, offering a critical analysis of how various religious doctrines, as conceptualized by Al-Qadi Abd al-Jabbar, translated into lived experiences and societal norms. El-Sharkawy's work provides a unique perspective on the historical and intellectual debates surrounding interfaith comparisons, highlighting Al-Qadi Abd al-Jabbar's significant contributions to Islamic thought and his nuanced approach to understanding religious diversity. This scholarly exploration is essential for anyone interested in the philosophy of religion, Islamic theology, or comparative religious studies, shedding light on the enduring relevance of classical Islamic scholarship in contemporary discourse.