The Beneficial Epistle & Decisive Proof on The Science of Divine Unity is a short, yet comprehensive text in mainstream Sunni theology and can be regarded as a summary of some of the more elaborate works in the field. For decades, it has been the primary beginners’ text, taught, studied, and memorized as part of the curriculum of the prestigious al-Fath al-Islami Academy of Damascus, which was founded by the shaykh himself. With his succinct and lucid style, the author adequately explains the core tenets of faith that every Muslim should believe in, namely, Allah and His attributes, prophethood, the revealed scriptures, angels, divine decree, and the Last Day. As such, the work serves as an invaluable introduction to the Sunni creed for both students of theology and laymen alike.