Abu Hamid Ghazali (d.1111) ranks among the greatest of Muslim thinkers. This is the first extensive study of Imam Ghazali’s theory of prayer (dhikr and du’a) and demonstrates its significance and application in the daily programme of divine offices. Kojiro Nakamura: is a Professor of Islamic Studies at Obirin University and Professor Emeritus at the University of Tokyo. He has authored many books on the history of Islamic thought in Japanese. “Ghazali on Invocations and Supplications” is an English translation of selection taken from Ghazali’s major work, “The Revivification of Religious Sciences”.