The Bible

Genesis 1:19

¹⁹ And the evening and the morning were the fourth day.

Commentary

Firmament

The firmament of heaven represents mutual love. The firmament, as in Genesis 1, signifies the internal man.

(References: Arcana Coelestia 24)

The Bible

Psalms 115:16

¹⁶ The heaven, even the heavens, are the LORD's: but the earth hath he given to the children of men.