Scholar Shaykh Muhammad Hisham Kabbani, a scholar in the ways of Islamic law, Sufism, and chemistry, and chairman of the Michigan-based educational organization Islamic Supreme Council of America, presents Keys to the Divine Kingdom, an introduction for lay readers to better understand the physical and spiritual worlds. Sufi teachings in particular must be "tasted" and experienced fully, rather than simply read or spoken, to be truly understood. Keys to the Divine Kingdom is specifically written for lay people and other non-Mulsim readers, and to this end Arabic terminology is replaced with English translations save in a few instances where the original Arabic is pivotal to the message. The original source material for Keys to the Divine Kingdom is Kabbani's oral presentations, which were unrehearsed and entirely from the heart and soul. Chapters reflect upon the journey of weary individuals frustrated and confused by conflicting religious messages, degrees of nearness to God, holy figures, the role of science in understanding what is not know to man, and how to "polish the heart", and much more. A deeply spiritual compilation that reaches out to the reader with its message of tolerance, enlightenment, and approaching God through the virtue of humility and improving the self.