I've recently been revisiting Augustine's Confessions. In doing so, one thing I noticed is Monica's role in the story. One could pretty easily make the argument that Augustine understands his conversion to Christianity as being the result of his mother, Monica's ("Thy handmaid") prayers. It seems God's sovereignty and providence go to work to save him in conversation with Monica's faithfulness in prayer.
Furthermore, Book 9, located at the very end of the narrative segment of the work, is mostly a retrospective on Monica's life in the context of narrating the circumstances of her death, offering accounts of her faithfulness not only in prayer for the conversion of her son, but also, for instance, in her transformation (by an almost explicit Yoderian revolutionary subordination!) of her prone-to-rage husband.
Augustine writes to confess his own sins, but the positive example that he biographically points to because of its power to point to Christ is not his own transformed saintly life as much as it is the sustained saintliness of his mother, St. Monica.