269. And there was a rainbow round about the throne in aspect like unto an emerald. That this signifies the appearance of Divine truth in the heavens surrounding the Lord is evident from the signification of a rainbow in aspect like unto an emerald, as denoting the appearance of Divine truth in its circumference; for a rainbow round about the throne signifies Divine truth around it, and in aspect signifies appearance. The reason why the appearance of the rainbow was like that of an emerald, is that it indicated the Last Judgment, for the colour of this stone is green, and green signifies truth obscured. Divine truth in its splendour appears either of a sky-colour, or of various colours disposed in beautiful order, as those of the rainbow; but when it is obscured it appears of the colour of an emerald. The heaven which is called the former heaven was that on which judgment was to be executed, and which was about to perish (see Apoc. 21:1) which caused the obscurity. This is why mention is made of a rainbow, and its aspect like that of an emerald. The reason why the rainbow signifies Divine truth in the heavens in its order, and thence in its beauty, is that there are infinite varieties of truth from good in the heavens; and when they are represented by colours, they present the appearance of a beautiful rainbow. This is why the rainbow was made a sign of the covenant after the flood (Genesis 9:12-17). (That there are infinite varieties in the heavens may be seen in the work, Heaven and Hell 56, 405, 418, 486, and in the small work, The Last Judgment 13; and in Arcana Coelestia 684, 690, 3744, 5598, 7236, 7833, 7836, 9002. That colours in heaven appear from the light there, and that they are its modifications and variegations, n. 1042, 1043, 1053, 1624, 3993, 4530, 4742, 4922; and that the colours appear various according to the varieties of the states of truth from good, and thence of intelligence and wisdom, n. 4530, 4677, 4922, 9466. That rainbows appear in heaven, and whence and what they are, n. 1042, 1043, 1623, 1624, 1625.)

5598. 'And our generation' means regarding the truths of faith there. This is clear from the meaning of 'generation' as the birth of truth from good or faith from charity, dealt with in 1145, 1255, 4070, 4668. The reason 'generation' has this meaning in the internal sense is that in heaven no other kind of birth is meant than what is called regeneration, which is effected by means of the truth of faith and the good of charity. By this kind of generation or birth the children of men become the children of the Lord; these are they who are called 'the born of God' in John 1:13. The variations that exist in the offspring of good from truth and truth from good within that kind of generation are what determine the brotherly or blood relationships and the relationships by marriage that exist in heaven.

[2] In heaven unending variations exist; but those variations are effected by the Lord in such a way that they resemble families in which there are brothers, sisters, sons-in-law, daughters-in-law, grandsons, granddaughters, and so on. In general however all are organized into the kind of form that makes one united whole. They are like the variations within the human body, in which no one member is exactly the same as any other; indeed no one part within any member is the same as any other part. Even so, all those varying parts are organized into the kind of form in which they act as a single whole, and each fits in directly or remotely with the activity of another. Seeing a form such as this in the human being, one may deduce what the form must be like in heaven, with which there is a correspondence - a most perfect one - of everything in the human being.