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.

913. 'Let them spread out into the earth' means the action of the internal man into the external, while 'be fruitful' means increases in good, 'and multiply' increases in truth, and 'over the earth' means with the external man. This is clear from the train of thought and also from what has been stated and shown already about the meaning in the Word of 'being fruitful' as having reference to goods, and of 'multiplying' to truths. That 'the earth' means the external man has in like manner been shown already, so there is no need to pause and confirm these points. Here the subject is the action of the internal man into the external after a person has been regenerated. That is to say, when good starts 'to be fruitful' and truth 'to multiply', the external man is rendered correspondent or obedient. Until then this is not possible because the desires of the body are incompatible with goods, and the illusions of the senses with truths. The former annihilate the love of good, the latter the love of truth. The fruitfulness of good and the multiplication of truth take place in the external man - the fruitfulness of good in his affections, the multiplication of truth in his memory. The external man is here called 'the earth' into which mankind spreads out and over which they are fruitful and multiply.