2637. 'When Isaac his son was born to him' means when the Lord's Rational was made Divine. This is clear from the meaning of 'being born' as being manifested, dealt with in 2584, 2621, 2629, and from the representation of 'Isaac' as the Divine Rational, dealt with in 2630. The latter is said 'to be born' to Abraham when it has been made Divine, as also in verse 3 above, 'Abraham called the name of his son born to him', see 2628.

2629. 'Whom Sarah bore to him' means its essential being received from, and its manifestation given by, the Divine spiritual united to the Divine celestial. This is clear from the meaning of 'bearing' as giving manifestation to, dealt with in 2621; and since childbirth implies conception - and the giving of birth, or manifestation, rests with the Divine spiritual, while conception or the imparting of being rests with the Divine celestial, and these are united here - 'bearing' here means the receipt of being as well as the gift of manifestation; and also from the representation of 'Sarah' as the Divine spiritual united to the Divine celestial, dealt with in 1468, 1901, 2063, 2065, 2172, 2173, 2198, 2507. These arcana are so deep that they defy description, so deep in fact that they cannot be illustrated by anything at all in this world. They are intended for the minds of angels, to which they are presented in the light of heaven by means of things which lie beyond description.