Nicene and Post-Nicene Fathers: Series I/Volume I/Confessions/Book XII/Chapter 4
Chapter IV.—From the Formlessness of Matter, the Beautiful World Has Arisen.
4. What, then, should it be called, that even in some ways it might be conveyed to those of duller mind, save by some conventional word? But what, in all parts of the world, can be found nearer to a total formlessness than the earth and the deep? For, from their being of the lowest position, they are less beautiful than are the other higher parts, all transparent and shining. Why, therefore, may I not consider the formlessness of matter—which Thou hadst created without shape, whereof to make this shapely world—to be fittingly intimated unto men by the name of earth invisible and formless?