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.

383. Since our discernment corresponds to our lungs, and our thinking therefore to their breathing, "soul" and "spirit" in the Word mean discernment, as in "you shall love the Lord your God with your whole heart and your whole soul" (Matthew 22:35 [22:37]), or "God will give a new heart and a new spirit" (Ezekiel 36:26; Psalms 51:12-13 [51:10]). I have already explained [378-381] that the heart means the love of our volition, so soul and spirit mean the wisdom of our discernment.

You may see in Teachings for the New Jerusalem on the Lord 50-51 that the spirit of God, also called the Holy Spirit, means divine wisdom and therefore divine truth, the means of our enlightenment.

This is why "the Lord breathed on the disciples and said, 'Receive the Holy Spirit'" (John 20:22). This is also why it says, "Jehovah God breathed the breath of life into Adam's nostrils, and he became a living soul" (Genesis 2:7), and why God said to the prophet, "Prophesy over the spirit and say to the wind, 'Come, spirit, from the four winds and breathe upon these who have been slain, so that they may live'" (Ezekiel 37:9). There are similar statements elsewhere as well. It is why the Lord is called the spirit of the nostrils and also the breath of life.

Since our breathing comes through our nostrils, they are used to mean perception. An intelligent person is referred to as "keen-scented," and a dense person as "dull-scented." This is also why in Hebrew and in some other languages, "spirit" and "wind" are expressed by the same word. In fact, the word "spirit" is derived from [a root that means] breathing; so when people die we speak of their "breathing their last." This is also why people believe that a spirit is a wind or something airy, like the breath that issues from our lungs, and believe the same of the soul as well.

We can tell from this that "loving God with the whole heart and with the whole soul" means with all our love and all our discernment, and that "giving a new heart and a new spirit" means a new volition and a new discernment.

It is because the spirit means discernment that it says of Bezaleel that "he was filled with the spirit of wisdom, intelligence, and knowledge" (Exodus 31:3) and of Joshua that "he was filled with the spirit of wisdom" (Deuteronomy 34:9), and that Nebuchadnezzar said of Daniel that "a superlative spirit, one of knowledge and intelligence and wisdom was in him" (Daniel 6:5 [5:11-12, 14]), and why it says in Isaiah that "those who are wandering in spirit will know intelligence" (Isaiah 29:24). Similar statements may be found in many other places.