The book contains the first three volumes of Gregory of Tatev’s voluminous comprehensive work that is the sum of Armenian philosophical, theological, and physical thought, similar to monumental works by Thomas Aquinas, Albert the Great, and other great thinkers of the Middle Ages. Here the author discusses the teachings and positions of the Armenian Church, as well as the fundaments of Christianity, refuting diverse Christian teachings, sects, schisms, and heretical movements; and providing substantial answers regarding fundamental contradictions that existed between official teachings, churches, and faiths.