There are three classes of support for Christian belief: the metaphysical, the historical, and the experiential. The metaphysical argues from logic and the existence and nature of reality, the historical from the past - both human and pre-human, and the experiential from personal, and private, experience.
While I don't want to diminish the metaphysical or historical components of Christian belief and apologetics, I think that the most important source of living belief is the experiential, but it is also by far the hardest to communicate, since it is by nature, private and personal. While my experiences may convince me of the truth of the Christian faith, how can they convince you? They are part of my experience, not yours. It might seem to be an impossibility, yet this is the challenge that Augustine took on in "Confessions", and it is by the degree of difficulty that the extent of his success and the greatness of the work can be measured.
"Confessions" is a work of great beauty. Written in the form of a confessional prayer, Augustine bares himself utterly, and in so doing, makes the reader want to lower his defenses as well, making it possible to experience another's life more deeply than he might have thought possible, and in so doing, to translate his experience of Christianity across the divide that separates us from each other.
Because of the nature of "Confessions", I think that analysis of it is to be avoided. Analysis is distancing - it encourages the reader not to dive it in, but to stand back. You cannot experience "Confessions" and critique it at the same time, and all of the value is in the experience.