All that I consist of, is either form or matter. No corruption can reduce either of these unto nothing: for neither did I of nothing become a subsistent creature. Every part of mine then will by mutation be disposed into a certain part of the whole world, and that in time into another part; and so in infinitum; by which kind of mutation, I also became what I am, and so did they that begot me, and they before them, and so upwards in infinitum. For so we may be allowed to speak, though the age and government of the world, be to some certain periods of time limited, and confined.