The Transcendent Philosophy of the Four Journeys of the Intellect (Arabic:الحكمة المتعالية في الاسفار العقلية الاربعة; Hikmat al-muta‘aliya fi-l-asfar al-‘aqliyya al-arba‘a), known as Four Journeys, is an extended compendium of Islamic philosophy written by the 17th century Islamic scholar, Mulla Sadra, In which he attempted to reach Sufism and prove the idea of Unity of Existence by offering a new intake and perspective on Peripatetic philosophy that was offered by Alpharabius and Avicenna in the Islamic world.
355 Mulla Sadrā (Ṣadr ad-Dīn Muḥammad Shīrāzī (Persian: ملا صدرا); Molla Sadra; Mollasadra; or Sadr-ol-Mote'allehin; (Arabic: صدرالمتألهین)) (c. 1571 CE–1640 CE), was an Iranian Shia Islamic philosopher, theologian and ‘Ālim (scholar).
Oliver Leaman of the University of Kentucky calls Mulla Sadra "the most important and influential philosopher of the last four hundred years in the Muslim world".[3]: p.
[8] In its nine volumes, Asfar examines the philosophical opinions of the different schools of Islamic philosophy.
His work synthesizes Avicennism, Shahab al-Din Suhrawardi's Illuminationist philosophy, Ibn Arabi's Sufi metaphysics, and the theology of the Ash'ari school and Twelvers.[3]: p.
146–147 [6]: p. 114 In the first volume of Asfar, Mulla Sadra focuses solely on an analysis of the concept of wujud ("being") and quiddity (essence).[2]: p.
19 In the tenth section of the third journey of Asfar, Mulla Sadra expresses his opinion on the creation of world.