Today our Synod commemorates St. Augustine, no doubt the single most influential Church Father on the whole of the Western Church. From Synod's website and the Treasury:
Augustine was one of the greatest of the Latin church fathers and a significant influence in the formation of Western Christianity, including Lutheranism. Born in A.D. 354 in North Africa, Augustine's early life was distinguished by exceptional advancement as a teacher of rhetoric. In his book Confessions he describes his life before his conversion to Christianity, when he was drawn into the moral laxity of the day and fathered an illegitimate son. Through the devotion of his sainted mother Monica and the preaching of Ambrose, Bishop of Milan (339–97), Augustine was converted to the Christian faith. During the great Pelagian controversies of the 5th century, Augustine emphasized the unilateral grace of God in the salvation of mankind. Bishop and theologian at Hippo in North Africa from A.D. 395 until his death in 430, Augustine was a man of great intelligence, a fierce defender of the orthodox faith, and a prolific writer. In addition to the book Confessions, Augustine's book City of God had a great impact upon the church throughout the Middle Ages and Renaissance.
Today's writing from the Treasury, from one of his anti-Donatist works is quite choice. He defines "come out from among them, and touch no unclean thing" - "It means not consenting to them in will and not sparing them in word. I say this of Jeremiah, of Isaiah, of Daniel, and Ezekiel, and the rest of the prophets, who did not retire from the wicked people, lest they shoul desert the good who were mingled with that people." (Treasury, p. 666)
The prayer for today asks: "Give us strength to follow the example of Your servant Augustine of Hippo, so that knowing You we may truly love You and loving You we may fully serve You - for to serve You is perfect freedom." (Treasury, p. 666)
P.S. Yesterday, we commemorated St. Monica, although Treasury had the grace to blush and note that "On some Church Year calendars, Monica is remembered on May 4." Um, YEAH. Like the day she died?