491. The same things are signified by “sons” and “daughters” in this chapter (verses 4, 7, 10, 13, 16, 19, 26, 30), but such as is the church, such are the “sons and daughters” that is, such are the goods and truths; the truths and goods here spoken of are such as were distinctly perceived, because they are predicated of the Most Ancient Church, the principal and parent of all the other and succeeding churches.
Arcana Coelestia #2070
2070. Verse 17. And Abraham fell upon his faces, and laughed, and said in his heart, Shall there be born to a son of a hundred years? and shall Sarah that is a daughter of ninety years bear? “Abraham fell upon his faces,” signifies adoration; “and laughed,” signifies the affection of truth; “and said in his heart,” signifies that He so thought; “shall there be born to a son of a hundred years?” signifies that the rational of the Lord’s Human Essence should then be united to His Divine Essence; “and shall Sarah that is a daughter of ninety years bear?” signifies that truth conjoined with good will do this.