The Revival of the Religious Sciences by Imam al-Ghazali can be described as a book that will never die. This is because it contains a vital cognitive force that time cannot obliterate. In it the Imam discusses Islamic rulings, beliefs and character, in the style of an admonisher who understands the psyche and its secrets as well as spiritual diseases. What distinguishes this book from others is its strong spiritual influence on the reader which makes him seek both soundness of heart and his Lord’s pleasure through acts of worship, rather than the mere performance of acts of worship so that they are legally valid. The book is a comprehensive encyclopaedia for all of a Muslim’s religious affairs, including beliefs, acts of worship, dealings and character, as well as for individual and societal welfare. Al-Ghazali’s style is that of one who practices what he knows, one who is determined to rise from the dry, ordinary manner of teaching to one which encourages action.