Abū Ḥāmid Muḥammad ibn Muḥammad Ghazālī (1058–1111)was an Islamic theologian, jurist, philosopher, cosmologist , psychologist and Sufi mystic of Persian origin, and remains one of the most celebrated scholars in the history of Sunni Islamic thought. He is considered a pioneer of methodic doubt and skepticism, Ghazali has sometimes been referred to by historians as the single most influential Muslim after the Prophet Muhammad. His work that successfully changed the course of Islamic philosophy. Al-Ghazali’s approach to resolving apparent contradictions between reason and revelation was accepted by almost all later Muslim theologians. Ghazali began the successful introduction of Aristotelianism or rather Avicennaism into Muslim theology.