St. Ambrose - Bishop of Milan from 374 to 397; born probably 340, at Trier, Arles, or Lyons; died 4 April, 397. He was one of the most illustrious Fathers and Doctors of the Church, and fitly chosen, together with St. Augustine, St. John Chrysostom, and St. Athanasius, to uphold the venerable Chair of the Prince of the Apostles in the tribune of St. Peter's at Rome. His dogmatic writings deal mostly with the divinity of Jesus Christ and of the Holy Ghost, also with the Christian sacraments. At the request of the young Emperor Gratian (375-383) he composed a defence of the true divinity of Jesus Christ against the Arians, and another on the true divinity of the Holy Ghost against the Macedonians.
Saint , bishop of Milan from 374, wrote, composed, and imposed orthodoxy on the early Christian Church.
This ecclesiastical figure of the 4th century most influenced. He served as consular prefect of Liguria and Emilia, headquartered, before popular acclamation. Ambrose staunchly opposed Arianism, and people accused him of fostering persecutions of Jews and pagans.
Tradition credits Ambrose with promoting "antiphonal chant", a style in which one side of the choir responds alternately, as well as Veni redemptor gentium, a hymn of Advent.
Ambrose ranks of the four original doctors of the Church, and the patron. He notably influenced Saint Augustine of Hippo.
St. Ambrose explains the mysteries of the Christian faith (Baptism and the Eucharist). His views on repentance are really weird and in my view unscriptural. He quite masterfully talks about repentance but then starts droning on and on about penances which he affirms only the church requires. His treatment of Repentance makes the book a mixed bag.
St Ambrose of Milan makes beautiful analogies about the Holy Sacraments that made me tear up. Great book, especially if you come from an evangelical background.