In book twenty of the forty books which compose the Revival of the Religious Sciences (Ihya' 'ulum al-din), Abu hamid al-Ghazali gives a full account of the customs and character of the Messenger of God, Muhammad. It is not a biography of Muhammad (peace and blessing of God be upon him) but a roadmap for those who want to strengthen their faith, increase their knowledge, and deepen their understanding of the second part of the testimony of faith,...