Iḥyā′ ‘Ulūm al-Dīn (transl. The Revival of the Religious Learnings; Arabic: احياء علوم الدين‎) is an 11th-century book written by Abū Ḥāmid Muḥammad ibn Muḥammad al-Ghazali. The book was composed in Arabic and was based on personal religious experience. It is regarded as one of his chief works and a classic introduction to the pious muslim's way to God.