'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)

3297. Verses 24-26 And her days for bringing forth were completed, and behold, there were twins in her womb. And the first came out, ruddy all over, like a hairy garment; and they called his name Esau. And after that his brother came out, and his hand was grasping Esau's heel; and he called his name Jacob. And Isaac was a son of sixty years when she bore them.

'Her days for bringing forth were completed' means the first state of the effect. 'And behold, there were twins in her womb' means that the two were conceived simultaneously. 'And the first came out, ruddy all over, like a hairy garment' means good constituting the life of natural truth. 'And they called his name Esau' means its essential nature. 'And after that his brother came out' means truth. 'And his hand was grasping Esau's heel' means the lowest level of natural good, to which [truth] clung with some power. 'And he called his name Jacob' means the doctrine of natural truth. 'And Isaac was a son of sixty years when she bore them' means the state of Rational Truth at that time.