136. It is well known that the will and understanding rule the body at pleasure, for what the understanding thinks, the mouth speaks, and what the will wishes, the body does. From these facts it is evident that the body is a form corresponding to the understanding and the will. And because form is also predicated of the understanding and the will, it is evident that the form of tie body corresponds to the form of the understanding and the will. But this is not the place to describe the nature of one form or the other. Besides there are innumerable things in each form, and innumerable things on either side act as one, because they mutually correspond. Hence it is that the mind (mens), or the will and understanding, rule the body at pleasure, thus entirely as it rules itself. From the foregoing it follows that the interiors of the mind act as one with the interiors of the body, and the exteriors of the mind with the exteriors of the body. The interiors of the mind will be discussed below when first the degrees of life are treated of, then similarly, the interiors of the body.