IV. We must mention as much as we can of the matters contained in his account, since to enumerate them all is impossible; for he embraces that beautiful world which is perceptible only by the intellect, as the account of the first day will show: (16) for God, as apprehending beforehand, as a God must do, that there could not exist a good imitation without a good model, and that of the things perceptible to the external senses nothing could be faultless which wax not fashioned with reference to some archetypal idea conceived by the intellect, when he had determined to create this visible world, previously formed that one which is perceptible only by the intellect, in order that so using an incorporeal model formed as far as possible on the image of God, he might then make this corporeal world, a younger likeness of the elder creation, which should embrace as many different genera perceptible to the external senses, as the other world contains of those which are visible only to the intellect. (17) But that world which consists of ideas, it were impious in any degree to attempt to describe or even to imagine: but how it was created, we shall know if we take for our guide a certain image of the things which exist among us. When any city is founded through the exceeding ambition of some king or leader who lays claim to absolute authority, and is at the same time a man of brilliant imagination, eager to display his good fortune, then it happens at times that some man coming up who, from his education, is skilful in architecture, and he, seeing the advantageous character and beauty of the situation, first of all sketches out in his own mind nearly all the parts of the city which is about to be completed–the temples, the gymnasia, the prytanea, and markets, the harbour, the docks, the streets, the arrangement of the walls, the situations of the dwelling houses, and of the public and other buildings. (18) Then, having received in his own mind, as on a waxen tablet, the form of each building, he carries in his heart the image of a city, perceptible as yet only by the intellect, the images of which he stirs up in memory which is innate in him, and, still further, engraving them in his mind like a good workman, keeping his eyes fixed on his model, he begins to raise the city of stones and wood, making the corporeal substances to resemble each of the incorporeal ideas. (19) Now we must form a somewhat similar opinion of God, who, having determined to found a mighty state, first of all conceived its form in his mind, according to which form he made a world perceptible only by the intellect, and then completed one visible to the external senses, using the first one as a model.