399. (1) Love or the will is man's very life. This follows from the correspondence of the heart with the will (considered above, n. 378-381). For as the heart acts in the body, so does the will act in the mind; and as all things of the body depend for existence and motion upon the heart, so do all things of the mind depend for existence and life upon the will. It is said, upon the will, but this means upon the love, because the will is the receptacle of love, and love is life itself (see above, n. 1-3), and love, which is life itself, is from the Lord alone. By the heart and its extension into the body through the arteries and veins it can be seen that love or the will is the life of man, for the reason that things that correspond to each other act in a like manner, except that one is natural and the other spiritual. How the heart acts in the body is evident from anatomy, which shows that wherever the heart acts by means of the vessels put forth from it, everything is alive or subservient to life; but where the heart by means of its vessels does not act, everything is lifeless. Moreover, the heart is the first and last thing to act in the body. That it is the first is evident from the fetus, and that it is the last is evident from the dying, and that it may act without the cooperation of the lungs is evident from cases of suffocation and swooning; from which it can be seen that the life of the mind depends solely upon the will, in the same way as the substitute life of the body depends on the heart alone; and that the will lives when thought ceases, in the same way as the heart lives when breathing ceases. This also is evident from the fetus, from the dying, and from cases of suffocation and swooning. From which it follows that love or the will is man's very life.

400. (2) Love or the will strives unceasingly towards the human form and all things of that form. This is evident from the correspondence of heart and will. For it is known that all things of the body are formed in the womb, and that they are formed by means of fibers from the brains and blood vessels from the heart, and that out of these two the tissues of all organs and viscera are made; from which it is evident that all things of man have their existence from the life of the will, which is love, from their first principles, out of the brains, through the fibers; and all things of his body out of the heart through the arteries and veins. From this it is clearly evident that life (which is love and the will therefrom), strives unceasingly towards the human form. And as the human form is made up of all the things there are in man, it follows that love or the will is in a continual conatus and effort to form all these. There is such a conatus and effort towards the human form, because God is a Man, and Divine Love and Divine Wisdom is His life, and from His life is everything of life. Any one can see that unless Life which is very Man acted into that which in itself is not life, the formation of anything such as exists in man would be impossible, in whom are thousands of thousands of things that make a one, and that unanimously aspire to an image of the Life from which they spring, that man may become a receptacle and abode of that Life. From all this it can be seen that love, and out of the love the will, and out of the will the heart, strive unceasingly towards the human form.

401. (3) Love or the will is unable to effect anything by its human form without a marriage with wisdom or the understanding. This also is evident from the correspondence of the heart with the will. The embryo man lives by the heart, not by the lungs. For in the fetus the blood does not flow from the heart into the lungs, giving it the ability to respire; but it flows through the foramen ovale into the left ventricle of the heart; consequently the fetus is unable to move any part of its body, but lies enswathed, neither has it sensation, for its organs of sense are closed. So is it with love or the will, from which the fetus lives indeed, though obscurely, that is, without sensation or action. But as soon as the lungs are opened, which is the case after birth, he begins to feel and act, and likewise to will and think. From all this it can be seen, that love or the will is unable to effect anything by means of its human form without a marriage with wisdom or the understanding.

402. (4) Love or the will prepares a house or bridal chamber for its future wife, which is wisdom or the understanding. In the created universe and in each of its particulars there is a marriage of good and truth; and this is so because good is of love and truth is of wisdom, and these two are in the Lord, and out of Him all things are created. How this marriage has existence in man can be seen mirrored in the conjunction of the heart with the lungs; since the heart corresponds to love or good, and the lungs to wisdom or truth (see above, n. 378-381, 382-385). From that conjunction it can be seen how love or the will betroths to itself wisdom or the understanding, and afterwards weds it, that is, enters into a kind of marriage with it. Love betroths to itself wisdom by preparing for it a house or bridal chamber, and marries it by conjoining it to itself by affections, and afterwards lives wisely with it in that house. How this is cannot be fully described except in spiritual language, because love and wisdom, consequently will and understanding, are spiritual; and spiritual things can, indeed, be expressed in natural language, but can be perceived only obscurely, from a lack of knowledge of what love is, what wisdom is, what affections for good are, and what affections for wisdom, that is, affections for truth, are. Yet the nature of the betrothal and of the marriage of love with wisdom, or of will with understanding, can be seen by the parallel that is furnished by their correspondence with the heart and lungs. What is true of these is true of love and wisdom, so entirely that there is no difference whatever except that one is natural and the other spiritual. Thus it is evident from the heart and lungs, that the heart first forms the lungs, and afterwards joins itself to them; it forms the lungs in the fetus, and joins itself to them after birth. This the heart does in its abode which is called the breast, where the two are encamped together, separated from the other parts of the body by a partition called the diaphragm and by a covering called the pleura. So it is with love and wisdom or with will and understanding.

403. (5) Love or the will prepares all things in its own human form, that it may act conjointly with wisdom or the understanding. We say, will and understanding, but it is to be carefully borne in mind that the will is the entire man; for it is the will that, with the understanding, is in first principles in the brains, and in derivatives in the body, consequently in the whole and in every part (see above, n. 365-367). From this it can be seen that the will is the entire man as regards his very form, both the general form and the particular form of all parts; and that the understanding is its partner, as the lungs are the partner of the heart. Beware of cherishing an idea of the will as something separate from the human form, for it is that same form. From this it can be seen not only how the will prepares a bridal chamber for the understanding, but also how it prepares all things in its house (which is the whole body) that it may act conjointly with the understanding. This it prepares in such a way that as each and every thing of the body is conjoined to the will, so is it conjoined to the understanding; in other words, that as each and everything of the body is submissive to the will, so is it submissive to the understanding. How each and every thing of the body is prepared for conjunction with the understanding as well as with the will, can be seen in the body only as in a mirror or image, by the aid of anatomical knowledge, which shows how all things in the body are so connected, that when the lungs respire each and every thing in the entire body is moved by the respiration of the lungs, and at the same time from the beating of the heart. Anatomy shows that the heart is joined to the lungs through the auricles, which are continued into the interiors of the lungs; also that all the viscera of the entire body are joined through ligaments to the chamber of the breast; and so joined that when the lungs respire, each and all things, in general and in particular, partake of the respiratory motion. Thus when the lungs are inflated, the ribs expand the thorax, the pleura is dilated, and the diaphragm is stretched wide, and with these all the lower parts of the body, which are connected with them by ligaments therefrom, receive some action through the pulmonic action; not to mention further facts, lest those who have no knowledge of anatomy, on account of their ignorance of its terms should be confused in regard to the subject. Consult any skillful and discerning anatomist whether all things in the entire body, from the breast down be not so bound together, that when the lungs expand by respiration, each and all of them are moved to action synchronous with the pulmonic action. From all this the nature of the conjunction prepared by the will between the understanding and each and every thing of the human form is now evident. Only explore the connections well and scan them with an anatomical eye; then, following the connections, consider their cooperation with the breathing lungs and with the heart; and finally, in thought, substitute for the lungs the understanding, and for the heart the will, and you will see.

404. (6) After the nuptials, the first conjunction is through affection for knowing, from which springs affection for truth. By the nuptials is meant man's state after birth, from a state of ignorance to a state of intelligence, and from this to a state of wisdom. The first state which is one of pure ignorance, is not meant here by nuptials, because there is then no thought from the understanding, and only an obscure affection from the love or will. This state is initiatory to the nuptials. In the second state, which belongs to man in childhood, there is, as we know, an affection for knowing, by means of which the infant child learns to speak and to read, and afterwards gradually learns such things as belong to the understanding. That it is love, belonging to the will, that effects this, cannot be doubted; for unless it were effected by love or the will it would not be done. That every man has, after birth, an affection for knowing, and through that acquires the knowledge by which his understanding is gradually formed, enlarged, and perfected, is acknowledged by every one who thoughtfully takes counsel of experience. It is also evident that from this comes affection for truth; for when man, from affection for knowing, has become intelligent, he is led not so much by affection for knowing as by affection for reasoning and forming conclusions on subjects which he loves, whether economical or civil or moral. When this affection is raised to spiritual things, it becomes affection for spiritual truth. That its first initiatory state was affection for knowing, may be seen from the fact that affection for truth is an exalted affection for knowing; for to be affected by truths is the same as to wish from affection to know them, and when found, to drink them in from the joy of affection.

(7) The second conjunction is through affection for understanding, from which springs perception of truth. This is evident to any one who is willing by rational insight to examine the matter. From rational insight it is clear that affection for truth and perception of truth are two powers of the understanding, which in some persons harmonize as one, and in others do not. They harmonize as one in those who wish to perceive truths with the understanding, but do not in those who only wish to know truths. It is also clear that every one is in perception of truth so far as he is in an affection for understanding; for if you take away affection for understanding truth, there will be no perception of truth; but give the affection for understanding truth, and there will be perception of truth according to the degree of affection for it. No man of sound reason ever lacks perception of truth, so long as he has affection for understanding truth. That every man has a capacity to understand truth, which is called rationality, has been shown above.

(8) The third conjunction is through affection for seeing truth, from which springs thought. That affection for knowing is one thing, affection for understanding another, and affection for seeing truth another, or that affection for truth is one thing, perception of truth another, and thought another, is seen but obscurely by those who cannot perceive the operations of the mind as distinct, but is seen clearly by those who can. This is obscurely seen by those who do not perceive the operations of the mind as distinct, because with those who are in affection for truth and in perception of truth, these operations are simultaneous in the thought, and when simultaneous they cannot be distinguished. Man is in manifest thought when his spirit thinks in the body, which is especially the case when he is in company with others; but when he is in affection for understanding, and through that comes into perception of truth, he is then in the thought of his spirit, which is meditation. This passes, indeed, into the thought of the body, but into silent thought; for it is above bodily thought, and looks upon what belongs to thought from the memory as below itself, drawing therefrom either conclusions or confirmations. But real affection for truth is perceived only as a pressure of will from something pleasurable which is interiorly in meditation as its life, and is little noticed. From all this it can now be seen that these three, affection for truth, perception of truth, and thought, follow in order from love, and that they have existence only in the understanding. For when love enters into the understanding, which it does when their conjunction is accomplished, it first brings forth affection for truth, then affection for understanding that which it knows, and lastly, affection for seeing in the bodily thought that which it understands; for thought is nothing but internal sight. It is true that thought is the first to be manifest, because it is of the natural mind; but thought from perception of truth which is from affection for truth is the last to be manifest; this thought is the thought of wisdom, but the other is thought from the memory through the sight of the natural mind. All operations of love or the will not within the understanding have relation not to affections for truth, but to affections for good.

405. That these three from the will's love follow in order in the understanding can, indeed, be comprehended by the rational man but yet cannot be clearly seen and thus so proved as to command belief. But as love that is of the will acts as one with the heart by correspondence, and wisdom that is of the understanding acts as one with the lungs (as has been shown above) therefore what has been said (in n. 404) about affection for truth, perception of truth, and thought, can nowhere be more clearly seen and proved than in the lungs and the mechanism thereof. These, therefore, shall be briefly described. After birth, the heart discharges the blood from its right ventricle into the lungs; and after passing through these it is emptied into the left ventricle: thus the heart opens the lungs. This it does through the pulmonary arteries and veins. The lungs have bronchial tubes which ramify, and at length end in air-cells, into which the lungs admit the air, and thus respire. Around the bronchial tubes and their ramifications there are also arteries and veins called the bronchial, arising from the vena azygos or vena cava, and from the aorta. These arteries and veins are distinct from the pulmonary arteries and veins. From this it is evident that the blood flows into the lungs by two ways, and flows out from them by two ways. This enables the lungs to respire non-synchronously with the heart. That the alternate movements of the heart and the alternate movements of the lungs do not act as one is well known. Now, inasmuch as there is a correspondence of the heart and lungs with the will and understanding (as shown above), and inasmuch as conjunction by correspondence is of such a nature that as one acts so does the other, it can be seen by the flow of the blood out of the heart into the lungs how the will flows into the understanding, and produces the results mentioned just above (n. 404) respecting affection for and perception of truth, and respecting thought. By correspondence this and many other things relating to the subject, which cannot be explained in a few words, have been disclosed to me. Whereas love or the will corresponds to the heart, and wisdom or the understanding to the lungs, it follows that the blood vessels of the heart in the lungs correspond to affections for truth, and the ramifications of the bronchia of the lungs to perceptions and thoughts from those affections. Whoever will trace out all the tissues of the lungs from these origins, and disclose the analogy with the love of the will and the wisdom of the understanding, will be able to see in a kind of image the things mentioned above (n. 404), and thereby attain to a confirmed belief. But since a few only are familiar with the anatomical details respecting the heart and lungs, and since confirming a thing by what is unfamiliar induces obscurity, I omit further demonstration of the analogy.

406. (9) Through these three conjunctions love or the will is in its sensitive life and in its active life. Love without the understanding, or affection which is of love without thought, which is of the understanding, can neither feel nor act in the body; since love without the understanding is as it were blind, and affection without thought is as it were in thick darkness, for the understanding is the light by which love sees. The wisdom of the understanding, moreover, is from the light that proceeds from the Lord as a sun. Since, then, the will's love, without the light of the understanding, sees nothing and is blind, it follows that without the light of the understanding even the bodily senses would be blind and blunted, not only sight and hearing, but the other senses also, - the other senses, because all perception of truth is a property of love in the understanding (as was shown above), and all the bodily senses derive their perception from their mind's perception. The same is true of every bodily act; for action from love without understanding is like man's action in the dark, when he does not know what he is doing; consequently in such action there would be nothing of intelligence and wisdom. Such action cannot be called living action, for action derives its esse from love and its quality from intelligence. Moreover, the whole power of good is by means of truth; consequently good acts in truth, and thus by means of truth; and good is of love, and truth is of the understanding. From all this it can be seen that love or the will through these three conjunctions (see above, n. 404) is in its sensitive life and in its active life.