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, namely the first pillar of Islam. The author details the Messenger's noble nature and his miracles, while removing doubts regarding his message. He deals with the issue of the imitation of Muhammad (peace and blessing of God be upon him) noting that the ultimate source of knowledge is revelation from God which comes to us through the Messenger. This volume lays clear that the aim of the imam in this Series is to call for a return to the Sunna and the imitation of the Messenger in all aspects of life.