Concerning the Ten Commandments, which are the Heads of the Law (58)

Accordingly, to one who understands how to apply himself to philosophy in a genuine, honest spirit, and who lays claim to a guiltless and pure piety, God gives that most beautiful and holy commandment, that he shall not believe that any one of the parts of the world is its own master, for it has been created; and the fact of having been created implies a liability to destruction, even though the thing created may be made immortal by the providence of the Creator; and there was a time once when it had no existence, but it is impiety to say that there was a previous time when God did not exist, and that he was born at some time, and that he does not endure for ever.