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.