In the introduction part of this thesis, which aims to discuss the place and importance of religious experience in Ghazali's system of thought, the place of religious experience in philosophy of religion and the place of Ghazali's religious experience in history are examined. In the first chapter, the concepts of religion, philosophy and experience are explained and their place in the framework of religious experience is explained. The possibility of religious experience, the types of religious experience and especially the concept (...) of intuition have been emphasized and the value of religious experience has been tried to be revealed in terms of being an evidence for the existence of God. In the second chapter, the life of Ghazali, the crisis he experienced in 1095 and the spiritual depression he had as a result of the religious experience that emerged as a result of this were discussed and his experience and thought shaped around it were examined. The mystics who determined the perception of religion, and the mental development theory that Ghazali developed as a result of his experience are explained. This theory is important in terms of forming a basis for his understanding of knowledge based on religious experience. In the third chapter, Ghazali's understanding of religious experience is emphasized. In this section, Ghazali's concept of religious experience and other related concepts are explained. Then, his efforts to ground the revelation and all kinds of knowledge with this religious experience were emphasized, and his 'revival' activity towards religion, philosophy, theology, fiqh, and mysticism was discussed. Ghazali rejects the grounding of knowledge with sense organs and reason and claims that knowledge should be grounded by revelation/inspiration or intuition. This claim has been discussed in various examples, and finally, an evaluation of the understanding of religious experience that is the basis of knowledge has been made and the issue of whether there is evidence for the existence of God or not has been discussed. In the end, religious experience determined his whole thought system from beginning to end. He reinterpreted everything according to religious experience and his revival project greatly influenced the Islamic world and thought after him. Keywords: Philosophy of Religion, Ghazali, Ihya (Revival), Mysticism, religious experience. (shrink)