Allegorical Explanation of Genesis, Chap. I., Concerning the Origin of the Church and Its Worship
13 Proceed in your confession, say to the Lord your God, O my faith, Holy, Holy, Holy, O Lord my God, in Your name have we been baptized, Father, Son, and Holy Ghost, in Your name do we baptize, Father, Son, and Holy Ghost, because among us also in His Christ did God make heaven and earth, namely, the spiritual and carnal people of His Church. Yea, and our earth, before it received the “form of doctrine,” was invisible and formless, and we were covered with the darkness of ignorance. For Thou correctest man for iniquity, and “Your judgments are a great deep.” But because Your Spirit was “borne over the waters,” Your mercy forsook not our misery, and Thou said, “Let there be light,” “Repent, for the kingdom of heaven is at hand.” Repent, let there be light. And because our soul was troubled within us, we remembered You, O Lord, from the land of Jordan, and that mountain equal unto Yourself, but little for our sakes; and upon our being displeased with our darkness, we turned unto You, “and there was light.” And, behold, we were sometimes darkness, but now light in the Lord.
Source: Confessions (New Advent)