The speech of the celestial angels abounds in the vowels A (ah, as in father), and U (as u in rule). One may often determine from the Hebrew vowels in a passage which words belong to the class of celestials and which to the spirituals — i.e., whether they involve good or truth. The former use more frequently the sounds of O and U, for they have a full tone, and also occur oftener in the Third Heaven. (Heaven and Hell 241; True Christian Religion 278;, Spiritual Experiences 5112, 5620, 5787)

241. Angels who live in the Lord's heavenly kingdom talk much the same way as angels who are citizens of the Lord's spiritual kingdom. However, heavenly angels talk from a deeper level of thought than spiritual angels do. Further, since heavenly angels are attuned to the good of love for the Lord, they talk from wisdom, while spiritual angels — being attuned to the good of thoughtfulness toward their neighbor (which in its essence is truth, see 215)-talk from intelligence. For wisdom comes from what is good and intelligence from what is true.

The speech of heavenly angels is like a gentle stream, soft and virtually unbroken, while the speech of spiritual angels is a little more resonant and crisp. Then too, the vowels U and O tend to predominate in the speech of heavenly angels, while in the speech of spiritual angels it is the vowels E and I. The vowels stand for the sound and in the sound there is the affection; for as already noted (236), the sound of angels' speech is responsive to their affection, and the articulations of the sound, or the words, correspond to the individual ideas that stem from their affection. For this reason, the vowels do not belong to the language but to a raising of its words, by means of sounds, toward various affections according to the state of each individual. So in Hebrew the vowels are not written and are also pronounced variously. This enables angels to recognize what someone's quality is in respect to affection and love.

Further still, the language of heavenly angels lacks any hard consonants and rarely puts two consonants together without inserting a word that begins with a vowel. This is why the little word and is inserted so often in the Word, as can be determined by people who read the Word in Hebrew, in which language that word is soft and in either pronunciation is a vowel sound. We can also learn some of this from the vocabulary of the Hebrew Bible, since the words belong to either a heavenly or a spiritual category. That is, they involve either what is good or what is true, with the expressions involving what is good making ample use of the vowels U and O and to some extent A, and the expressions involving what is true making use of E and I.

Since affections are expressed primarily through sounds, words that use U and O are well loved in human language to express great matters like heaven and God. Musical sounds tend in this direction as they rise, when they are dealing with such matters, but not when they are dealing with lesser things. This is why the art of music is so adept at expressing various kinds of affection.

208. One heaven is united to another (or a community of one heaven with a community of another) by the Lord alone, through a direct and an indirect inflow. The direct is from himself, and the indirect is sequential through the higher heavens into the lower ones. ¹

Since the union of the heavens through inflow is accomplished by the Lord alone, the greatest possible precautions are taken to prevent any angel from a higher heaven from looking down into a community of a lower one and talking with anyone there. The moment this happens, the angel will lose intelligence and wisdom. The reason needs to be stated. Every angel has three levels of life, like the three levels of heaven. For the ones in the inmost heaven, the third or inmost level is opened and the second and first are closed. For people in the intermediate heaven the second level is opened and the first and third are closed; and for people in the outermost heaven the first level is opened and the second and third are closed. The moment an angel of the third heaven, then, looks down into a community of the second and talks with anyone there, the third level of that angel is closed; and when it is closed the angel is deprived of wisdom because her or his wisdom dwells on the third level, with none on the second and first.

This is the meaning of the Lord's words in Matthew:

Let those who are on the roof not come down to take what is in the house; and let those who are in the field not turn back to take their garments. (Matthew 24:17-18)

And in Luke:

Let those who are on the roof on that day while their belongings are in the house not go down to get them, and let those who are in the field not turn back to what is behind them: remember Lot's wife. (Luke 17:31-32)

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