This book was originally submitted in the form of a thesis for a Masters Degree to the Department of Aqeedah of the Umm al-Qura University in Makkah, Saudi Arabia. The examining committee comprised the following: Muhammad Qutb, the supervisor, as chairman; Shaykh Abdur Razzaq Afifi as a member; and Dr. Abdul Azeez Obeid as a member. The author was granted a Masters Degree, with excellence, on Saturday evening, the 4th of Shaban 1401H.