Saint Ambrose was born in France to wealthy Roman parents in 340 AD. When he was mature, and his father had passed away, he moved to Rome, where he finished his education, and became a governor. While still a catechumen (an unbaptized Christian), the bishop of Milan died, and he was chosen for the position. At the order of the emperor he was baptized, and appointed as the new bishop, the office he would hold until his death.
Once he became a bishop, he gave away all his wealth and property for church use and to help the poor. He then took on a strict ascetic life and devoted himself to his work. St. Ambrose's preaching quickly became famous and he attracted many people to his church. He is well-known for his writings in which he both explains and defends the true character of the Christian faith. He also wrote on the moral and educational requirements of priests.
The followings books are included in this collected work:
1. On the Christian Faith 2. On the Holy Spirit 3. On the Mysteries 4. On Repentance 5. On the Duties of the Clergy 6. Concerning Virgins 7. Concerning Widows 8. On the Death of Satyrus 9. Memorial of Symmachus 10. Sermon against Auxentius 11. Letters