In Exodus 20:14; Deuteronomy 5:18, the commandment against adultery signifies not only the violation of marriage vows, but also obscene acts, depraved language, and lustful thoughts.

In Matthew 5:28, a spiritual angel understands adultery to mean adulterating the goods of the Word and falsifying its truths. A celestial angel interprets it as denying the Divine of the Lord and profaning the Word. (Doctrine Regarding Sacred Scripture 67)

All the various kinds or degrees of adultery are spiritually understood by the prohibited conjunctions (Leviticus 18:24, 28.)

(Референци: Apocalypse Explained 235)

126. LIGHT AND HEAT IN HEAVEN

People who think only from nature cannot comprehend that there is light in the heavens. Yet, such is the light in the heavens that it exceeds by many degrees the noonday light of the world. I have often seen that light even during the evening and night. At first, I marvelled when I heard angels saying that the light of the world is little more than a shadow in comparison with the light of heaven, but, having seen it, I can testify that it is so. The brightness and splendour are such as cannot be described. The things that I have seen in the heavens have been seen in that light, thus more clearly and distinctly than things in this world.