Arcana Coelestia #6433
6433. 'And of the womb' means these two - goodness and truth - joined together. This is clear from the meaning of 'the womb' as the inmost centre of conjugial love; and since conjugial love receives its being from the heavenly marriage, which is goodness and truth joined together, 'the womb' means these two joined together. For the meaning of 'the womb' as the inmost centre of conjugial love, see 4918; and for the origin of conjugial love in the heavenly marriage, which is goodness and truth joined together in heaven, 2618, 2728, 2729, 2803, 3132, 4434, 4835, 6179.
Arcana Coelestia #2623
2623. 'A son' means the Divine Rational. This is clear from the meaning of 'a son'. In the internal sense of the Word 'a son' means truth, 489, 491, 533; and because truth is the principal element in the rational, 2072, 2189, 'a son' also means the rational. But here the Divine Rational is meant in which the principal element is good. 'Isaac' too, to whom 'a son' refers, represents this good, as will be shown further on.