Before Adam ate the forbidden fruit, the heavenly (spiritual) dimension, and the earthly dimension were one realm— one domain, one plane of existence in which God, angels, and man had open communication and relationship; There was no separation between the spiritual realm, and the physical realm. There was perfect compatibility and agreement between them, an idea also found in Mesopotamian literature: “Heaven talked with Earth. Earth talked with Heaven.” (The Xianhua Wang Metamorphosis of Enlil (Satan) in Early Mesopotamia Pg. 152)
“Anu (the creator god) carried off heaven while Enlil carried off the earth and assumed most of An’s powers.” (Kramer, Samuel Noah The Sumerians The University of Chicago Press, Chicago, 1963. Pg. 37-41)
“Enlil … was at about the same time cosmologically considered the deity who separated Heaven from Earth and Earth from Heaven.” (Xianhua Wang The Metamorphosis of Enlil in Early Mesopotamia. Pg. 100.)

God walked in the Garden, and man could look at his face and endure God’s fire and lightning. Man’s transgression brought decay, degeneration, and death. God’s perfection and the fallen physical, earthly realm became incompatible. Now God’s fiery presence would scorch the ground like when He descended on Mt. Sinai (The mountains melt like wax before the LORD, before the Lord of all the earth. Psalms 97: 5). Now man could no longer see God’s face and live. The Garden of Eden, where God, angels, and man could commune together was gone. Open, unveiled fellowship became impossible. This divide of heaven and Earth caused by Satan (Enlil) was recorded by the ancient Sumerians ( Kramer, Samuel Noah The Sumerians The University of Chicago Press, Chicago, 1963. Pg. 37-41).
After The Fall, when God came into the Garden in the cool of the evening, Adam and Eve were compelled to hide themselves. Why? The first sign of disconnect was when they realised they were naked. They had been clothed with light like God covers himself “with light as with a garment” (Psalms 104: 2). They observed the glow in which they had previously been clothed was fading. This reality was displayed after Moses spent forty days with God and upon coming down the mountain, he “did not know that the skin of his face shone while he talked with Him” (Exodus 34: 29). When the congregation saw him, “The skin of his face shone, and they were afraid to come near him” (Exodus 34: 30).
After God announced the consequences of man’s actions, God had to remove Himself from his own creation, lest His fire destroy it. This removal is what the Scriptures call the veil. It is what marks the boundary between our earthly, physical domain and the spiritual domain. Isaiah first spoke of its removal: “And He will destroy on this mountain the surface of the covering cast over all people and the veil that is spread over all nations. He will swallow up death forever, and the Lord GOD will wipe away tears from all faces” (Isaiah 25: 7– 8). The prophet Isaiah also pined: “Oh that you would rend the heavens and come down” (Isaiah 64: 1). Whatever the veil is, it can be torn and removed.
There are four other distinct places where the veil (heavens) was opened: “I saw the heavens were opened and I saw visions of God” (Ezekiel 1: 1). “Jesus came up … and the heavens were opened to Him” (Matthew 3: 16). Stephen: “I see the heavens opened and the Son of Man standing at the right hand of God!” (Acts 7: 55– 56). John: “I saw heaven opened … Jesus was on a white horse” (Revelation 19: 11).
Since The Fall the cosmos exists as two realms— the one in which we live, and the other where spirit-based beings live and where God’s presence is manifest. The one realm was split into two: the earthly dimension is what Satan rules, he is the god of this world; the heavenly or spiritual dimension is where God rules. (God rules all, of course, but Satan has authority in the earthly realm.)
God did not curse the ground because of Adam; rather, like a reporter, He simply presented the consequence of the degenerative decay-death reaction that Adam triggered (Genesis 2: 17). God said, “Cursed is the ground for your sake” (Genesis 3: 17).
God created Adam from the adamáh (earth); Adam was the earth-man, the federal head of creation. Adam and the adamáh were linked physically and hence their fates were linked. When Adam ate from the fruit, death, degeneration, and decay happened upon Adam and upon the Earth and material cosmos as well. Decay permeated the entire creation from the invisible world of cells and DNA to all the animals, birds, and fish that God had formed out of the adamáh. Degeneration began within all living and non-living matter; the atoms of every tree, flower, blade of grass, rock, mountain, planet, and star. The complete composition of all physical creation became incompatible with God’s fiery presence.
I have found it liberating to understand the true history of God and His Cosmos and that the ancient world like the Sumerians recorded it in accord with God’s Word. I hope you find it liberating as well.
The information in this post has been extracted from Douglas Hamp’s book, Corrupting the Image 2: Hybrids, Hades, and the Mt Hermon Connection. Eskaton Media Group. There is a third book in the series: Corrupting the Image 3: Singularity, Superhumans, and The Second Coming of Jesus. I have not read it as yet but I am sure I will find some gems in it.