 Ghazzālī, an orthodox jurist and a major exponent of faith based theology (Ash‘arite) having studied philosophy, thought discursive reasoning stood on a solid ground but soon turned against philosophy, offering a devastating critique of reason in his The Incoherence of Philosophers (Tahāfut al-falāsifah). Having been disillusioned with intellectual sciences, he practiced asceticism for a number of years in seclusion and finally found his answers in the Sufi tradition. The spiritual journey of Ghazzālī from an orthodox jurist to a Sufi is one of the most remarkable accounts of the transformation of a Muslim sage who turned from the outward to the inner life of Islam and found Sufism to be the only path that leads to truth. He spent the later part of his life teaching, writing and practicing Sufism.