In the Bible, things that are lower down, or under, physically, generally represent things that are lower or more external spiritually. In some cases, the lower things have been separated and put away to protect the good, but in others, it can mean that a less exalted idea or good desire is supporting a more exalted one.

(Odkazy: Arcana Coelestia 4564 [1-2], 8610, 9656)

8793. 'Onto Mount Sinai' means into the good in which truth is to be implanted. This is clear from the meaning of 'Mount Sinai' as the good in which the truths of faith are to be implanted, dealt with above in 8753. Truth that is to be implanted in good is the subject in the next chapter, the Ten Commandments declared from Mount Sinai being internal truths, and the laws and statutes that are commanded in the chapters which come after that being external truths. Both the latter and the former mean the truths that are to be implanted in good.