The first thing necessary to be known is, who is the God of heaven; for everything else depends on this.  In the universal heaven, no other is acknowledged for its God, but the Lord Alone; they say there, as He Himself taught, that He is One with the Father; that the Father is in Him, and He in the Father; that whosoever seeth Him, seeth the Father; and that everything holy proceeds from Him.  I have often conversed with the angels on this subject, and they constantly declared that they are unable to divide the Divine Being into three, because they know and perceive that the Divine Being is one, and that He is One in the Lord.

The angels, taken collectively, are called heaven, because they compose it:  but still it is the Divine Sphere proceeding from the Lord, which enters the angels by influx, and is by them received, which essentially constitutes it, both in general and in particular.  The Divine Sphere proceeding from the Lord is the good of love and the truth of faith:  in proportion, therefore, as the angels receive good and truth from the Lord, so far they are angels, and so far they are heaven.

As in heaven there are infinite varieties, and no society is exactly like another, nor indeed any angel, therefore heaven is divided in a general, in a specific, and in a particular manner.  It is divided, in general, into two kingdoms, specifically, into three heavens, and in particular, into innumerable societies.

There are angels who receive the Divine Sphere proceeding from the Lord more and less interiorly.  They who receive it more interiorly are called celestial angels; but they who receive it less interiorly are called spiritual angels.  Hence, heaven is divided into two kingdoms, one of which is called the Celestial Kingdom, and the other, the Spiritual Kingdom.

The angels of each heaven do not dwell all together in one place, but are divided into larger and smaller societies, according to the difference of the good of love and faith in which they are grounded; those who are grounded in similar good forming one society.  There is an infinite variety of kinds of good in the heavens; and every angel is such in quality as is the good belonging to him.

That heaven, viewed collectively, is in form as one man, is a mystery which is not yet known to the world:  but it is well known in the heavens; for the knowledge of this mystery, with the particular and most particular circumstances relating to it, is the chief article of the intelligence of the angels; since many other things depend upon it, which, without a knowledge of this as their common centre, could not possibly enter distinctly and clearly into their ideas.  As they know that all the heavens together with their societies are in form as one man, they also call heaven THE GRAND AND DIVINE MAN; divine, because the Divine Sphere of the Lord constitutes heaven.

From my experience, which I have enjoyed for many years, I can affirm that angels are in every respect men; that they have faces, eyes, ears, a body, arms, hands, and that they see, hear, and converse with each other; in short they are deficient in nothing that belongs to a man except that they are not super-invested with a material body.