16
But in the fourth generation they shall come hither again: for the iniquity of the Amorites is not yet full.
Genesis 15:16
Arcana Coelestia # 1797
1797. Verse 3 And Abram said, See, to me You have not given seed, and behold, a son of my house is my heir.
'Abram said, See, to me You have not given seed' means that there was no internal dimension of the Church, which is love and faith. 'Behold, a son of my house is my heir' means that in the Lord's kingdom there would be only that which is external.
