4223. But as regards this correspondence, the fact is that although the heavens above mentioned do indeed correspond to the very organic forms of the human body, and therefore it is said that these societies or those angels belong to the province of the brain, to the province of the heart, to the province of the lungs, or to the province of the eye, and so on, they nevertheless correspond chiefly to the functions of these viscera or organs. The case herein is as with the organs or viscera themselves, in that their functions constitute a one with their organic forms; for no function can be conceived of except from forms, that is, from substances, for the substances are the subjects from which they exist. Sight, for example, cannot be conceived of apart from the eye; nor breathing apart from the lungs. The eye is the organic form from which and by means of which the sight exists, and the lungs are the organic form from which and by means of which the breathing exists; and so with all the rest. It is the functions therefore to which the heavenly societies chiefly correspond; and as they correspond to the functions, they correspond also to the organic forms; for the one is indivisible and inseparable from the other, inasmuch that whether you speak of the function or the organic form by which and from which is the function, it comes to the same thing. Hence there is correspondence with the organs, members, and viscera, because there is with the functions; and therefore when the function is brought into exercise, the organ also is excited. The same is the case with everything that man does; when he wills to do this or that, in this manner or that, and is thinking of it, the organs then move in concurrence, thus in accordance with the intention of the function or use; for it is the use that commands the forms.
 This shows that the use existed before the organic forms of the body came forth; and that the use produced and adapted them to itself, and not the reverse. But when the forms have been produced, and the organs adapted, the uses proceed from them; and then it appears as if the forms or organs were prior to the uses, when yet such is not the case. For use flows in from the Lord, and this through heaven, according to order, and according to the form in which heaven has been ordinated by the Lord, thus according to correspondences. Thus does man come into existence, and thus also does he subsist. And hence again does it appear why it is that man corresponds to the heavens in regard to both generals and particulars.