244. The same thing happens in the world. A man not altogether stupid, and who has not confirmed himself in falsities from the pride of self-intelligence, hearing others speak on some exalted matter, or reading something of the kind, if he is in any affection of knowing, understands these things and also retains them, and may afterwards confirm them. A bad man as well as a good man may do this. Even a bad man, though in heart he denies the Divine things pertaining to the church, can still understand them, and also speak of and preach them, and in writing learnedly prove them; but when left to his own thought, from his own infernal love he thinks against them and denies them. From which it is obvious that the understanding can be in spiritual light even when the will is not in spiritual heat; and from this it also follows that the understanding does not lead the will, or that wisdom does not beget love, but only teaches and shows the way, - teaching how a man ought to live, and showing the way in which he ought to go. It further follows that the will leads the understanding, and causes it to act as one with itself; also that whatever in the understanding agrees with the love which is in the will, the love calls wisdom. In what follows it will be seen that the will does nothing by itself apart from the understanding, but does all that it does in conjunction with the understanding; moreover, that it is the will that by influx takes the understanding into partnership with itself, and not the reverse.
245. The nature of the influx of light into the three degrees of life in man which belong to his mind, shall now be shown. The forms which are receptacles of heat and light, that is, of love and wisdom in man, and which (as was said) are in threefold order or of three degrees, are transparent from birth, transmitting spiritual light as crystal glass transmits natural light; consequently in respect to wisdom man can be raised even into the third degree. Nevertheless these forms are not opened except when spiritual heat conjoins itself to spiritual light, that is, love to wisdom; by such conjunction these transparent forms are opened according to degrees. It is the same with light and heat from the sun of the world in their action on plants on the earth. The light of winter, which is as bright as that of summer, opens nothing in seed or in tree, but when vernal heat conjoins itself to that light then the heat opens them. There is this similarity because spiritual light corresponds to natural light, and spiritual heat to natural heat.
246. This spiritual heat is obtained only by fleeing from evils as sins, and at the same time looking to the Lord; for so long as man is in evils he is also in the love of them, for he lusts after them; and the love of evil and the lust, abide in a love contrary to spiritual love and affection; and such love or lust can be removed only by fleeing from evils as sins; and because man cannot flee from evils from himself, but only from the Lord. He must look to the Lord. So when he flees from evils from the Lord, the love of evil and its heat are removed, and the love of good and its heat are introduced in their stead, whereby a higher degree is opened; for the Lord flowing in from above opens that degree, and then conjoins love, that is, spiritual heat, to wisdom or spiritual light, from which conjunction man begins to flourish spiritually, like a tree in spring-time.
247. By the influx of spiritual light into all three degrees of the mind man is distinguished from beasts; and, as contrasted with beasts, he can think analytically, and see both natural and spiritual truth; and when he sees them he can acknowledge them, and thus be reformed and regenerated. This capacity to receive spiritual light is what is meant by rationality (referred to above), which every man has from the Lord, and which is not taken away from him, for if it were taken away he could not be reformed. From this capacity, called rationality, man, unlike the beasts, is able not only to think but also to speak from thought; and afterwards from his other capacity, called freedom (also referred to above), he is able to do those things that he thinks from his understanding. As these two capacities, rationality and freedom, which are proper to man, have been treated of above (n. 240), no more will be said about them here.
248. UNLESS THE HIGHER DEGREE WHICH IS THE SPIRITUAL IS OPENED IN MAN, HE BECOMES NATURAL AND SENSUAL.
It was shown above that there are three degrees of the human mind, called natural, spiritual, and celestial, and that these degrees may be opened successively in man; also, that the natural degree is first opened; afterwards, if man flees from evil as sins and looks to the Lord, the spiritual degree is opened; and lastly, the celestial. Since these degrees are opened successively according to man's life, it follows that the two higher degrees may remain unopened, and man then continues in the natural degree, which is the outmost. Moreover, it is known in the world that there is a natural and a spiritual man, or an external and an internal man; but it is not known that a natural man becomes spiritual by the opening of some higher degree in him, and that such opening is effected by a spiritual life, which is a life conformed to the Divine precepts; and that without a life conformed to these man remains natural.
249. There are three kinds of natural men; the first consists of those who know nothing of the Divine precepts; the second, of those who know that there are such precepts, but give no thought to a life according to them; and the third, of those who despise and deny these precepts. In respect to the first class, which consists of those who know nothing of the Divine precepts, since they cannot be taught by themselves they must needs remain natural. Every man is taught respecting the Divine precepts, not by immediate revelations, but by others who know them from religion, on which subject see The Doctrine of the New Jerusalem Concerning the Sacred Scriptures (n. 114-118). Those of the second class, who know that there are Divine precepts but give no thought to a life according to them, also remain natural, and care about no other concerns than those of the world and the body. These after death become mere menials and servants, according to the uses which they are able to perform for those who are spiritual; for the natural man is a menial and servant, and the spiritual man is a master and lord. Those of the third class, who despise and deny the Divine precepts, not only remain natural, but also become sensual in the measure of their contempt and denial. Sensual men are the lowest natural men, who are incapable of thinking above the appearances and fallacies of the bodily senses. After death they are in hell.
250. As it is unknown in the world what the spiritual man is, and what the natural, and as by many he who is merely natural is called spiritual, and conversely, these subjects shall be separately discussed, as follows:
(1) What the natural man is, and what the spiritual man.
(2) The character of the natural man in whom the spiritual degree is opened.