7. V. Both that heat and that light flow into man: the heat into his will, where it produces the good of love; and the light into his understanding, where it produces the truth of wisdom.

It is well known that all things universally have relation to good and truth, and that there is not a single thing in existence in which there is not something related to those two. On this account there are two receptacles of life in man: one, which is the receptacle of good, called the will; and another, which is the receptacle of truth, called the understanding; and, as good is of love and truth is of wisdom, the will is the receptacle of love, and the understanding the receptacle of wisdom. Good is of love, because what a man loves that he wills, and when he brings it into action he calls it good: and truth is of wisdom, because all wisdom is from truths; indeed, the good which a wise man thinks is truth, which becomes good when he wills and does it.

[2] He who does not rightly distinguish between these two receptacles of life, which are the will and the understanding, and does not form for himself a clear notion respecting them, strives in vain to comprehend the nature of spiritual influx. For there is influx into the will, and there is influx into the understanding. Into the will of man there is an influx of the good of love, and into his understanding there is an influx of the truth of wisdom, each proceeding from Jehovah God, directly through the sun in the midst of which He is, and indirectly through the angelic heaven. These two receptacles, the will and the understanding are as distinct as heat and light; for, as was said above, the will receives the heat of heaven, which in its essence is love, and the understanding receives the light of heaven, which in its essence is wisdom.

[3] There is an influx from the human mind into the speech, and there is an influx into the actions; the influx into speech is from the will through the understanding, but the influx into the actions is from the understanding through the will. Those who are only acquainted with the influx into the understanding, and not at the same time with that into the will, and who reason and conclude therefrom, are like one-eyed persons, who only see the objects on one side of them, and not at the same time those on the other; and like maimed persons, who do their work awkwardly with one hand only; and like lame persons, who walk by hopping on one foot, with the assistance of a staff. From these few observations it is plain that spiritual heat flows into the will of man, and produces the good of love, and that spiritual light flows into his understanding, and produces the truth of wisdom.

6. -IV-. From that sun proceed heat and light; the heat proceeding from it is in its essence love, and the light from it is in its essence wisdom.

It is well known that in the Word, and thence in the common language of preachers, the Divine Love is expressed by fire; as when prayer is offered that heavenly fire may fill the heart, and kindle holy desires to worship God: the reason is that fire corresponds to love, and thence signifies it. Hence it is that Jehovah God appeared before Moses as a fire in the bush, and in like manner before the children of Israel on Mount Sinai; and that it was commanded for fire to be kept perpetually upon the altar, and for the lights of the lampstand in the tabernacle to be lighted every evening: these commands were given because fire signified love.

[2] That such fire has heat proceeding from it appears plainly from the effects of love: thus a man is set on fire, grows warm, and becomes inflamed, as his love is exalted into zeal, or into the glow of anger. The heat of the blood, or the vital heat of men and of animals in general, proceeds solely from love, which constitutes their life. Neither is infernal fire anything else than love opposed to heavenly love. Thence it is, as was stated above, that the Divine Love appears to the angels in their world as the sun, fiery, like our sun; and that the angels enjoy heat according to their reception of love from Jehovah God by means of that sun.

[3] It follows from this that the light there is in its essence wisdom; for love and wisdom, like Being [esse] and Manifestation [existere], are indivisible, since love is manifested by means of wisdom and according to it. This is as it is in our world: at the time of spring heat unites itself with light, and causes germination, and at length fruit. Moreover, everyone knows that spiritual heat is love and spiritual light is wisdom; for a man grows warm as he loves, and his understanding is in light as he becomes wise.

[4] I have often seen that spiritual light. It immensely exceeds natural light in brightness and splendour, for it is as brightness and splendour in their very essence: it appears like resplendent and dazzling snow, such as the garments of the Lord appeared when He was transfigured (Mark 9:3; Luke 9:29). As light is wisdom, therefore the Lord calls Himself the light which enlightens every man (John 1:9); and says in other places that He is light itself (John 3:19; 8:12; 12:35-36, 46); that is, that He is the Divine Truth itself, which is the Word, thus Wisdom itself.

[5] It is believed that natural light [lumen], which also is rational, proceeds from the light of our world: but it proceeds from the light of the sun of the spiritual world; for the sight of the mind flows into the sight of the eye, thus also the light of the spiritual world into the light of the natural world, but not the other way round: were it otherwise, there would be physical and not spiritual influx.