8644. 'The father-in-law of Moses' means the source of the good that was joined to God's truth. This is clear from the meaning of 'the father-in-law' as the good from which sprang the good that was joined to truth, dealt with in 6827; and from the representation of 'Moses' as God's truth, dealt with in 6752, 6771, 7010, 7014, 7382. The reason why 'the father-in-law' means the good from which sprang the good that was joined to truth is that the wife means good when the man means truth, 2517, 4510, 4823. Since the subject in what follows below is the joining together of Divine Good and Divine Truth, to the end that the arranging of truths into order may as a result take place with the member of the Church, it should be recognized that there is a difference between Divine Good and Divine Truth, in that Divine Good exists within the Lord, but that Divine Truth emanates from the Lord. They are like the fire of the sun and the light radiating from it. Fire exists within the sun but the light radiates from the sun; light holds no fire, only heat.

[2] Furthermore in the next life the Lord is the Sun, and He is the Light too. The Sun there, that is, He Himself, is Divine fire, which is the Divine Good of Divine Love. That Sun is the source of Divine light, which is Divine Truth emanating from Divine Good. This Divine Truth also holds within it Divine Good, though not such as it is in the Sun; it is modified for its reception in heaven. Unless it had been modified for reception, heaven could not have come into existence; for no angel can bear the flame coming from Divine Love. An angel would be consumed by it instantly, just as anyone would be the instant that the flame of the sun in the world breathed on him.

[3] But the way in which the Divine Good of the Lord's Divine Love is modified for reception cannot be known by anyone, not even by angels in heaven, because it is a modification of the Infinite for the finite. The Infinite is such that it lies far beyond all the power of understanding which the finite possesses, so far beyond that when that power of understanding tries to fix its attention on the Infinite it falls away like someone sinking into the depths of the sea and perishes. Regarding the Lord, that He is the Sun in heaven, that the Sun there is the Divine Good of His Divine Love, and that the Light from it is Divine Truth, the source of intelligence, see 1053, 1521-1533, 1619-1632, 2776, 3094, 3138, 3190, 3195, 3222, 3223, 3225, 3339, 3341, 3636, 3643, 3993, 4180, 4302, 4408, 4409, 4415, 4523, 4533, 4696, 7083, 7171, 7174, 7270, 8197.

3338. In addition to those two forms of light there are also two forms of warmth or heat, which likewise have two separate sources. The warmth of heaven comes from the Sun of heaven, which is the Lord, and the warmth of the world comes from the sun of the world, which is plainly visible before our eyes. The warmth of heaven manifests itself before the internal man by means of spiritual loves and affections, whereas the warmth of the world manifests itself before the external man by means of natural loves and affections. The first form of warmth constitutes the life of the internal man, whereas the second constitutes that of the external man; for without love and affection a person cannot live at all. Between those two forms of warmth also correspondences exist. Those two forms of it become loves and affections from the influx of the Lord's life, and therefore they show themselves to man as if they were not forms of warmth, when in fact that is what they are. For if a person did not receive warmth from the Lord's inflowing life, both in his internal man and in his external man, he would instantly fall down dead. These considerations are evident to anyone from the fact that to the extent a person is fired by love he also becomes warmer, and to the extent love departs he cools off. It is from this warmth that a person's will lives, but from the light spoken of above that his understanding lives.