44. And even when in the course of an historical narrative former institutions of men are described, the history itself is not to be reckoned among human institutions; because things that are past and gone and cannot be undone are to be reckoned as belonging to the course of time, of which God is the author and governor. For it is one thing to tell what has been done, another to show what ought to be done. History narrates what has been done, faithfully and with advantage; but the books of the haruspices, and all writings of the same kind, aim at teaching what ought to be done or observed, using the boldness of an adviser, not the fidelity of a narrator.