Khawajah NaṢir al-Din Tūsī and Three Theological, Philosophical, and Mystical Levels in his Thought

khawajah NaṢir al-Din Tūsī is considered one of the greatest and most influential Muslim scholars of the 7th century ('AH'). Most of his works are about Fakhr a-Din Rāzi's works and views, and are compiled in defense of philosophy providing correct and acceptable theological views. In addition to theology and philosophy, he has written works on mysticism. The problem with studying his works is that he sometimes believes in some principles when discussing theology and gives them up when discussing philosophy. He has also gone beyond the common philosophy by accepting the most fundamental doctrine of Islamic mysticism. Some believe that he, like some other thinkers, had experienced intellectual development and that these different views are due to different periods of his scientific and cognitive activities. The present paper seeks to prove that Khawajah NaṢir had had all these various method of thought simultaneously and had not experienced intellectual development. In fact, three longitudinal levels of his thought are theology, philosophy, and mysticism. By providing some examples, this paper proves that these three levels exist in his works.