origin and cause becomes visible and perceptible before the senses, there is correspondence between those things. Such is the correspondence between the spiritual and natural things appertaining to man; spiritual things being all the things of his love and wisdom, consequently of his will and understanding, and natural things being all things relating to his body; these latter, inasmuch, as they have existed, and perpetually exist, that is subsist, from the former, are correspondences, and therefore act in unity, as end, cause, and effect; thus the face acts in unison with the affections of the mind, the speech with the thought, and the actions of all the members with the will.—Divine Wisdom, ii.
Inasmuch as there is a correspondence of all things in the body, with all things of the mind in man, there is especially a correspondence with the heart and lungs, which correspondence is universal, because the heart reigns in the body throughout, and likewise the lungs. The heart and the lungs are the two fountains of all natural motions in the body, and the will and understanding are the two fountains of all spiritual activities in the same body, and the natural motions of the body must correspond to the activities of its spirit, for unless they correspond, the life of the body would cease, and likewise the life of the mind [animus], correspondence causing both to exist and subsist.
That the heart corresponds to the will, or what is the same thing, to the love, is evident from the variations of its pulse according to affections. It beats either slowly or quickly, high or low, soft or hard, equally or unequally, differently in gladness and in sorrow, in tranquillity of mind and in anger, in intrepidity and in fear, in the heat of the body and in its cold, and variously in diseases. Inasmuch as the heart corresponds to the affections which are of the love and thence of the will, therefore the wise men of old ascribed affections to the heart, and some of them fixed on the heart as the abode of affections. It is customary in common discourse to speak of a magnani-