14. The human mind is of three degrees, which are the celestial, the spiritual, and the natural. In the first degree is the soul; in the second, the spirit or mind, in the third is the body. It is the same thing, whether you say that man's mind is of three degrees, or that man himself is. For that part of the body which is in the beginnings-thus where its first is-is called the mind. The remaining parts are propagated and continue therefrom. What is the mind, if only in the head, except something separated or alien, and in which the mind does not exist by continuation? Let autopsy settle it: The origins of the fibres are the little glands, so-called, of the cortical substance; thence proceed the fibres; and these, bundled together into nerves, descend and pass through the whole body, and arrange and construct it. The celestial degree, in which is the soul or inmost man, is the form of love of the spiritual degree, in which is the mind or spirit: this is the intermediate man, and is a semblance of wisdom from love; the third degree, in which is the body, which is the ultimate man, is the containant of both; apart from it the two former degrees would not subsist. This can be further shown from the three heavens, the celestial, the spiritual, and the natural, where such men are. Wherefore the angels of the higher heavens are invisible to the angels of the lower if the latter approach from their heavens.