The Psychology of the Soul (Part II): The Qalb and the ‘Aql

This chapter “The Psychology of the Soul (Part II): The Qalb and the ‘Aql,” examines the intricate interplay between the heart (qalb) and intellect (‘aql) in the development of human personality and spiritual well-being. It begins with an introduction to the foundational concepts, followed by an exploration of Ibn Al-Qayyim’s classification of different types of hearts, including the polished heart of the believer and the sealed heart of the disbeliever. The discussion extends to the Qur’ānic, hādīth, and scholarly perspectives on the various conditions of the heart, emphasising the trials and tribulations it undergoes. The chapter then introduces the concept of ‘aql, explaining its significance as the faculty of reason and intellect in Islāmic psychology. The anatomical seat of ‘aql is debated, with views on its association with both the brain and the heart. Key Qur’ānic verses highlighting the consequences of the absence of ‘aql are examined, emphasising the moral and spiritual implications of neglecting this divine gift. Finally, the interrelationship between the qalb, ‘aql, and nafs (self) is analysed, illustrating how a mature intellect can guide the heart towards divine connection, while an immature intellect leads to a tarnished heart dominated by impulsiveness and desires. This comprehensive exploration highlights the importance of balancing intellect and heart in achieving spiritual and moral purity, highlighting the dynamic interaction between these elements in the holistic development of the self.