'Twins in the womb,' as in Genesis 25:24, signifies that both good and truth, represented by Esau and Jacob, were conceived together.

The natural as to its good is from the good of the rational as a father, and as to its truth from the truth of the rational as a mother. Each of these is called soul, but good is primarily such. (Arcana Coelestia 3299)

In Genesis 38:27, this signifies that good and truth are both elements of the church and are pairs. (Arcana Coelestia 747, 4918)

(Referências: Arcana Coelestia 3298)

747. 'Two and two' means complementary things. This may become clear to anyone from the fact that they are pairs. It is impossible for them to be pairs unless they are complementary to one another as truths and goods are, or evils and falsities. In fact all things contain the likeness of a marriage or a coupling together, as in the case of truths to goods, or of evils to falsities, because of the marriage of the understanding to the will, or of things of the understanding to those of the will. Indeed everything contains a marriage or coupling together of its own on which its very continuance depends.