In his later years, he also showed interest in mysticism, although this never formed a significant part of his thought. undoubtedly holds an important place in the debate in the Islamic tradition on the harmonization of reason and revelation. his acknowledgment of the primacy of the Qur'an grew with his years. believed proofs based on tradition ( hadith) could never lead to certainty ( yaqin) but only to presumption ( zann), a key distinction in Islamic thought. One of major concerns was the self-sufficiency of the intellect. It is not unusual for modern works to use it as a reference. At 32 volumes, it is even larger than the 28-volume Tafsir al-Tabari. The book is an exegesis and commentary on the Qur'an. Mafatih al-Ghayb ( Arabic: مفاتيح الغيب, lit.'Keys to the Unknown'), usually known as al-Tafsir al-Kabir ( Arabic: التفسير الكبير, lit.'The Large Commentary'), is a classical Islamic tafsir book, written by the twelfth-century Islamic theologian and philosopher Fakhruddin Razi (d.1210).
