3 St Augustine, 354-430 (Doctor of Grace)
Saint Augustine is the Doctor of Grace. He was a genius, although a genius to God means nothing. However, a holy genius means everything to God's mystical body. Grace enabled him to become a great spiritual lover and teacher. His conversion reveals God's bountiful grace. One of his famous sayings is: "Lord, give me what you ask of me and ask me what you will."
He is called the Doctor of Grace because of his miraculous transformation out of sin to the service of God's creatures. He served the church in Africa for many years as bishop with genuine love. His mother, St Monica, never stopped praying for him; a great model.
Those addicted to sin, fleeing from the church or decent principles or associated with immoral people, have a marvelous example to learn from in this great sinner turned saint. He discovered through prayer, change of heart and the holy influence of St Ambrose and others, to capture authentic a life of love and service toward others instead of a selfish love of life for himself.
"Augustine received a Christian education. His mother had him signed with the cross and enrolled among the catechumens. Once, when very ill, he asked for baptism, but, all danger being soon passed, he deferred receiving the sacrament, thus yielding to a deplorable custom of the times. His association with "men of prayer" left three great ideas deeply engraven upon his soul: a Divine Providence, the future life with terrible sanctions, and, above all, Christ the Saviour. "From my tenderest infancy, I had in a manner sucked with my mother's milk that name of my Saviour, Thy Son; I kept it in the recesses of my heart; and all that presented itself to me without that Divine Name, though it might be elegant, well written, and even replete with truth, did not altogether carry me away" (Confessions, I, iv). Quote taken from New Advent taken below, at the end.