738. He is called 'a son of six hundred years' here because, as shown already, 'son' means intellectual truth. He is not however referred to as a son in verse 11 below because there the subject is his temptation as regards things of the will.

To be fruitful relates to goodnesses, and to be multiplied, truths.

(References: Arcana Coelestia 1014, 1018)