The flaming heart is the human heart. It symbolizes Augustine’s love of God and his fellow brothers and sisters. The Augustinian heart is passionately alive, with the desire to know God and experience divine love in our lives.
The open book represents St. Augustine’s own conversion to Christianity and the Scriptures. It also symbolizes the Word of God, source of light and truth, and the quest for wisdom.
The arrow which pierces the heart represents the Spirit of God piercing our hearts, calling us to continued growth in faith, hope and love. This is the basis of that great restlessness, so typical of St. Augustine, which led him to seek God in all things and above all things.