269. And a rainbow was round about the throne in aspect like an emerald, signifies the appearance of Divine truth in the heavens about the Lord. This is evident from the signification of "a rainbow in aspect like an emerald," as denoting the appearance of Divine truth in its circumference; for "a rainbow round about the throne" signifies Divine truth round about; "in aspect like" signifies appearance. The appearance was like an emerald, because it had reference to the Last Judgment; for the color of this stone is green, and "green" signifies truth obscured. Divine truth in its brightness appears either of the color of heaven, or in various colors in beautiful order like a rainbow; but when obscured it appears of the color of an emerald. The heaven that was obscured was the heaven called "the former heaven," on which judgment was to be executed, and which was about to perish (See Revelation 21:1). On this account "a rainbow round about like an emerald" is mentioned. "Rainbow" signifies Divine truth in the heavens in its order and consequently in its beauty, because there are infinite varieties of truth from good in the heavens, and when these are represented by colors, they present the aspect of a most beautiful rainbow. For this reason "a rainbow" was made the sign of the covenant after the flood (Genesis 9:12-17). (That there are infinite varieties in the heavens see in the work on Heaven and Hell 56, 405, 418, 486; and in the small work onThe Last Judgment 13; and in Arcana Coelestia 684, 690, 3744, 5598, 7236, 7833, 7836, 9002; that colors in heaven appear from the light there, and that they are modifications and variegations of the light, n. 1042, 1043, 1053, 1624, 3993, 4530, 4742, 4922; and that the colors 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 are seen in heaven, and whence and what they are, n. 1042, 1043, 1623-1625)

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.