This volume presents the earliest and most important life of Gregory Thaumaturgus, preached by St. Gregory of Nyssa, and all the works that can be attributed to Gregory Thamumaturgus himself. It includes his Address of Thanksgiving to his teacher Origen; his Christian adaptation and interpretation of the Old Testament book of Ecclesiastes; his regulations restoring order in the Christian community after an invasion by the Goths; a remarkable treatise on God's ability to suffer and another on the Trinity; and two small texts that may or may not have been written by him.

This book introduces twelve key Christians from the second and third centuries, a formative period for the Church. These figures are: Justin Martyr, Irenaeus, Tatian, Theophilus of Antioch, Clement of Alexandria, Tertullian, Perpetua, Origen, Hippolytus, Cyprian, Gregory Thaumaturgos and Eusebius. Each chapter is self-contained and requires no preliminary knowledge of the figure under discussion, making this an ideal book for laity and for undergraduates studying Christian origins or Patristics.