This book includes the most important works by Quintus Tertullian, an outstanding early Christian writer of the II-III centuries, who made a great influence on the western theological tradition: "On the Soul", "About the Spectacles", "To the Pagans", "On Repentance", "On Idolatry", "On the Flesh of Christ", "On the baptism", "About the Flesh Resurrection", "On Prayer", "On chastity", "On Patience", " ", "To His Wife ", "On the Ascetic Mantle", "To Scapula", "Against Hermogenes", "On the Prescription of Heretics", "Against Praxeas", "Apology for the Christians". In his treaties Tertullian answers in details to the questions making the Church be worried from the times of the emperor chasings, condemning the numerous heresies of the donicean period, bringing to reason and teaching the pagans and brothers in faith.