Includes bibliographical references.

Second-century critic Celsus queries Polycarp, Valentinus, and Montanus about the Christian sect -- Second-century critic Celsus interviews Tertullian, Irenaeus, and Clement about Christianity -- Second- and third-century leaders Irenaeus, Tertullian, and Clement discuss beliefs necessary to be a true Christian -- Second- and third-century Origen and Tertullian debate faith's relationship to reason and the nature of the eternal Godhead -- Third-century Bishop Cyprian of Carthage is interviewed about the church and salvation -- Fourth-century Alexandrians deacon Athanasius and presbyter Arius are interviewed about the Council of Nicaea -- The fourth-century Cappadocian fathers meet to settle on the Orthodox doctrine of the Trinity -- Prominent fifth-century thinkers Cyril, Apollinaris, Nestorius, and Eutyches discuss the humanity and divinity of Jesus Christ -- Fifth-century Bishop Augustine of Hippo and British monk Pelagius argue about sin and salvation -- Medieval abbot-archbishop Anselm of Canterbury and monk-philosopher Abelard debate faith, reason, and atonement --