Having been trained in rhetoric and law and having studied Greek, Ambrose became known for his knowledge of the latest Greek writings, both Christian and pagan. In addition to Philo, Origen, and Basil of Caesarea, he even quoted Neoplatonist Plotinus in his sermons. He was widely regarded as an excellent preacher.
https://worship.calvin.edu/grants/worshiping-communities/
In many of those sermons, Ambrose expounded upon the virtues of asceticism. He was so persuasive that noble families sometimes forbade their daughters to attend his sermons, fearing they’d trade their marriageable status for a life of austere virginity.
One piece of his pastoral advice is still universally known: “When you are at Rome, live in the Roman style; when you are elsewhere, live as they live elsewhere.”
Ambrose also introduced congregational singing, and he was accused of “bewitching” Milan by introducing Eastern melodies into the hymns he wrote. Because of his influence, hymn singing became an important part of the Western liturgy.
St Ambrose pic.twitter.com/zuPAnDPlqc
— Robin Ward (@RobinWardSSH) December 7, 2022