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.

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

In Isaiah 40:12 'to weigh the mountains in a balance, and the hills in scales,' signifies that the celestial aspects of love and charity are from the Lord, and that He alone disposes their states.

(Reference: Arcana Coelestia 3101)