Mahiyat al-Aql wa Manahu wa Ikhtilaf al-Nas fihi

Mahiyat al-Aql wa-Ma'nahu wa-Ikhtilaf al-Nas Fih (Arabic: ماهية العقل ومعناه واختلاف الناس فيه, lit. 'The Essence of the Intellect, Its Meaning, and the Disagreement of People Concerning It') is a theological and epistemological treatise by the early Baghdadi Sufi scholar and theologian al-Harith al-Muhasibi (d. 243 AH / 857 CE) examining the definition, nature, and levels of the human intellect (aql) Mahiyat al-Aql wa Manahu …+1. The work is also cited in historical and bibliographical literature under the title Ma'iyyat al-Aql al-Alam lil-Zirikli+1.

Concept and Definitions of the Intellect

Al-Muhasibi wrote the treatise in response to an inquiry regarding the definition of the intellect and scholarly differences over it Mahiyat al-Aql wa Manahu …. Drawing upon linguistic usage, scripture, and theological debate, he states that the term aql encompasses three meanings:

1. The essential reality (haqiqa): An innate disposition (ghariza) placed by God in the servant at birth Mahiyat al-Aql wa Manahu …+1. Al-Muhasibi maintains that the intellect cannot be described by physical dimensions, corporeality, taste, smell, touch, or color, and is known exclusively through its manifestations in the heart and bodily limbs Mahiyat al-Aql wa Manahu …. He characterizes it as a light in the heart analogous to the light of sight in the eye, which grows through acquired knowledge and reflection Mahiyat al-Aql wa Manahu …+1.
2. Comprehension of discourse (fahm al-bayan): The capacity to understand spoken communication, discern worldly affairs, and grasp sensory and linguistic meaning Mahiyat al-Aql wa Manahu …. This level is shared by all individuals possessing the innate faculty of reason—believers and disbelievers alike—and serves as the basis upon which God's proof is established against moral agents Mahiyat al-Aql wa Manahu …+1.
3. Spiritual insight (al-aql 'an Allah): An elevated awareness and veneration of God's majesty, His commands, prohibitions, rewards, and punishments Mahiyat al-Aql wa Manahu …. This form of intellect leads directly to reverence, modesty before God, adherence to obedience, and avoidance of divine wrath Mahiyat al-Aql wa Manahu ….

He also notes and critiques alternative definitions advanced by theologians (mutakallimun), such as the view that the intellect is the unadulterated essence of the spirit (safwat al-ruh) or that it is identical with acquired knowledge itself, arguing instead that knowledge is a consequence generated by the innate faculty Mahiyat al-Aql wa Manahu …+1.

Typology of Human Reason

Al-Muhasibi classifies people into four categories according to their exercise of the intellect:

• Those who comprehend God's majesty, promises, and warnings, responding with humility and obedience Mahiyat al-Aql wa Manahu ….
• Those who comprehend the divine message intellectually (aql al-bayan) but stubbornly reject it out of pride and worldly ambition Mahiyat al-Aql wa Manahu ….
• Those blinded by self-admiration and blind imitation of their forebears, who master complex livelihoods and worldly calculations while remaining oblivious to the hereafter Mahiyat al-Aql wa Manahu …+1.
• Believers who grasp the necessity of faith for salvation and avoid disbelief, but whose comprehension of God's majesty is incomplete, leading them to commit sins through passion while acknowledging their wrongdoing Mahiyat al-Aql wa Manahu ….

Scholarly Reception and Influence

Al-Muhasibi's definition of the intellect as an innate capacity (ghariza) distinct from acquired knowledge was widely discussed in classical Islamic scholarship:

• In his legal theory work al-Burhan, Imam al-Haramayn al-Juwayni commended al-Muhasibi's formulation, observing that none of the early scholars approached defining the intellect as effectively as al-Muhasibi when he described it as an innate faculty through which sciences are grasped without itself being those sciences al-Tahqiq wa al-Bayan fi …+1. However, in al-Shamil, al-Juwayni expressed reservations about the attribution and questioned whether it conformed to Ash'arite doctrine al-Tahqiq wa al-Bayan fi …+1.
• Abu Hamid al-Ghazali incorporated al-Muhasibi's thesis into Ihya Ulum al-Din, identifying it as the primary sense of the term aql, namely the faculty that distinguishes human beings from animals and prepares the mind to receive theoretical knowledge Ihya Ulum al-Din.
• Later scholars, including Ibn al-Jawzi and Badr al-Din al-Zarkashi, cited al-Muhasibi's distinction between the intellect as sight and knowledge as a lamp, noting that just as sight cannot perceive without a lamp, the intellect requires the light of knowledge to discern matters Dhamm al-Hawa+1.

Manuscripts and Publication

Manuscripts of the treatise are preserved in several collections, including the Carullah collection in Istanbul and the British Museum in London Khizanat al-Turath - Fihr…. It was published in Beirut edited by Husayn al-Quwwatli in 1391 AH / 1971 CE, printed together with al-Muhasibi's Fahm al-Quran al-Durr al-Naqi fi Sharh ….