Against Hermogenes is a theological treatise written by Tertullian, a prominent Christian theologian of the 2nd century AD. The book is a refutation of the teachings of Hermogenes, a contemporary of Tertullian who espoused a form of Gnostic theology. Tertullian argues against Hermogenes' belief that matter is eternal and that God created the world out of pre-existing material. Instead, Tertullian asserts that God created the world ex nihilo, or out...