Arcana Coelestia #2000
2000. 'And God spoke to him, saying' means a degree of perception. This is clear from the meaning of 'Jehovah saying' as perceiving, 1898, 1899. Here it means a degree of perception because He was passing through a state of humiliation or adoration, in which He was joined and united to Jehovah according to the degree of perception present, for this is what humiliation entails. That perceptions are more and more interior, see 1616.
Arcana Coelestia #1899
1899. 'Behold, now, Jehovah has prevented me from bearing' means the state prior to the birth of the Interior or Divine Rational Man. This is clear from what has been stated already about the conception and birth of the Rational Man, that is to say, that the Lord's Divine Rational Man is represented by Isaac, whereas the first rational man which became Divine is represented by Ishmael. It was to represent these considerations that Sarai remained barren for so long a time until Ishmael had grown to be a boy, referred to in Chapter 21. This is the reason for the statement here that Jehovah prevented her from bearing.