With the arrangement of the Litanies and the Exposition of the Night Vigil, Imam al-Ghazali completes the first quarter of the Revival of the Religious Sciences. Were humankind but more acutely aware of life’ s extreme brevity and the actual urgency of being constantly present to God, the entire day would necessarily be punctuated by a near-continuous recitation of sacred litanies as Al-Ghazali makes clear.This volume, at the same time, highlights the mercy inherent in the division of the twenty-four hour day that allows people to engage in worship in diverse ways, even as they tend to work, study, families, other duties, and sleep.