Commentary on Three Fundamentals of IslamCommentary on the Three Fundamental Principles of Islam Written by renowned scholar Shaikh Muhammad bin Salih al Uthaymin, "Commentary on the Three Fundamental Principles of Islam" is an in depth study of the cornerstones of the Islamic faith. Serving as a comprehensive guide, this work details three very basic principles that are the knowledge of the one who created us, the knowledge of our Deen (Islam), and the knowledge about the Prophet(SAW) ).