'A son,' as in Genesis 5:28, signifies the rise of a new church. 'A son,'

In Genesis 24:3, this signifies the Lord's rationality regarding good.

In Genesis 30:7, this signifies a general truth.

In Genesis 38:4, this signifies evil and something idolatrous.

"Sons" are individual "truths," or concepts of how to do specific good things. This general representation is colored in by context. For instance, since Abraham represents the Lord's own desire for good when he lived as the human Jesus, and Sarah represents the truth that describes that desire for good, their son Isaac represents the specific ideas springing from that union called the Divine Rational. As with all things, "son" can also be used in the negative, meaning falsity that springs from evil.