8420. 'Whether they walk in My law or not' means, whether they can lead a life of truth and good. This is clear from the meaning of 'walking' as living, dealt with in 519, 1794; and from the meaning of 'law' as the Word, dealt with in 2606, 3382, 6752. And since the Word is meant, so is Divine Truth, 7463, and thus also teachings about what is good and true, so that 'walking in the law of Jehovah' means leading a life of truth and good as teachings about them demand. Everyone knows that 'walking in the law' means living as the law demands, for the expression is part of everyday language. From this it may be seen that [the activity] 'walking' means living, and also that the actual word 'walking', like so many other words, carries the very meaning it possesses in the spiritual sense. This is attributable solely to the influx of the spiritual world into ideas composing thought, and then into words; for without that influx would anyone ever talk of walking instead of living - of walking in the law, in the statutes, in the commandments, or in the fear of God? The same applies to 'going', that it means living, referred to just above in 8417, and also to travelling, advancing, and sojourning. The reason why these words mean living is that the spiritual world is not one of spatial dimensions but of states of life instead, 2625, 2684, 2837, 3356, 3387, 4321, 4882, 5605, 7381.

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.