Arcana Coelestia # 3133
3133. 'And when he heard the words of Rebekah his sister' means the inclination of it. This is clear from the affection which these words hold within them and also which flows from the things that come before, for these bear witness to the inclination on the part of the affection for truth, represented here by 'Rebekah his sister'.
Borne from the belly
In Isaiah 46:3, 4, a man who is regenerated by the Lord, is first of all conceived, and afterwards born, and at length educated and perfected, and since regeneration in this respect is like the natural generation of man, therefore, being born from the belly represents the state of man while he is regenerating.
(Odkazy: Apocalypse Explained 710)