Arcana Coelestia # 4376
4376. 'And I will go beside you' means that they are to be joined together. This is clear from the meaning of 'going beside you' as the linking of one to another, and so the meaning here is that they - good and truths - are to be joined together.
Arcana Coelestia # 533
533. Since nothing further is mentioned about Lamech apart from the fact that be beget sons and daughters, who are the conceptions and births of such a Church, there is no need to pause any longer over him. What these births, or sons and daughters, were, becomes clear from the Church, for the character of a Church determines that of its offspring. Both those Churches called Methuselah and Lamech breathed their last just before the flood.