St. Didymas the Blind is one of the most famous Coptic theologians of the early Church, while he is famously regarded as a student of Origen, his own work remains within the orthodox realm. Regrettably, many of his works have been lost to time, as they were not copied for future generations of student. His friend, St. Jerome, was able to make a Latin translation of this work from its original Greek. His work emphasizes the presence of personhood of the Holy Ghost in the Christian Trinity, looking to clarify the orthodox position in the face of perennial confusion that existed amongst his peers and the laity.