Book XIII Summary and Analysis

Augustine looks at the words "heaven and earth" in the Scriptures as referring to the spiritual, versus the material world. With the creation of the universe, matter was given light and made to exist. Likewise, light means the spiritual, which lights up material bodies and also human beings.

Augustine has a vision of the Holy Trinity, the father, son, and the Holy Ghost. God is the father, or the creator, the Son is wisdom, and the Holy Spirit is what lights up the creation, and that which "shone upon the waters". Augustine asks, why is the Holy Spirit only mentioned after the heaven and the earth? Why does Moses, the author of the Holy Scriptures, use the phrase "borne above the waters" to refer to the Holy Spirit? What Augustine is sure of is that without the Holy Spirit...