Eternity, Heaven, is the living world of light, our home in God. It is reality. It is a "world" of light, in which there is only light. There is no darkness, no shadows, no blockages to resist the light. "Nothing there but shines and shines forever."
The separation is an attempt to deny that this is so, by trying to resist the light. It's an attempt to block awareness of the pervasiveness of light by being unwilling to accept it into the mind. We put up walls that block the light, and this SEEMS to produce states of darkness.
An extremely important thing to realize here is that the seeming presence of the darkness ENTIRELY DEPENDS on the light being absent. It is a direct consequence or "effect" of the light being blocked. When the block is removed or the light is allowed to shine and pervade, what happens to "the darkness"? It doesn't go anywhere, it doesn't displace, it doesn't hide. Darkness cannot make light go away. Light completely overpowers it and cancels it. It simply vanishes.
Where is the darkness, in the light? There isn't any. In perfect light, infinite light, there is no darkness anywhere. So what happens to the darkness when the light shines? The light SHINES AWAY the darkness. How does it do it? Because darkness isn't really a THING in its own right, it is ONLY the temporary, illusory result of blocking the light.
The darkness's entire "existence" is 100% dependent on the light remaining blocked. The darkness is like a shadow. The shadow doesn't determine for itself what it is, it is a consequence or result of the way the light is blocked. It acquires all of its properties, shapes and forms, from the blockage, and can only symbolize the blockage. Having no inherent qualities, properties, behaviors, characteristics, life, or existence of ITS OWN, it is merely a side-effect of the appearance that "light is absent."
When you block the light of Heaven's reality, the world God created (the Sonship, not the Earth), you seem to produce in your mind a blockage to the light, which produces shadows or "darkness". Or to put it another way, darkness SEEMS to come out of nowhere, when the light is blocked. It just sort of "appears", like a mirage or hallucination. It isn't caused by anything real, it is "caused by" the illusion that reality is not present.
Darkness is sort of like a "hole" in the light. And the darkness seems to take on various shapes, forms, sizes, appearances. It may seem to represent objects. It may even seem to take on the shape of a human body, a tree, a planet or a galaxy. It may even SEEM as if these "objects" are actually alive or moving and thinking for themselves, as if they have an actual existence or identity, which none of them have. Shadows have no inherent properties of their own, no mind, no will and no life. These "life" FORMS are the illusion of what *separateness* looks like - the absence of Heaven's light. Shadows are always fragmented and conflicted.
All of spacetime is a bubble of darkness, like a hole in Heaven, where light seems "shut out". The "world you made" to block the light, the world which is "an attack on God", the world which is a "picture of the crucifixion of God's son", the world of "death" or the "dream of death", are all this same one thing - the illusion of the absence of God/Light.
The entire "physical universe" is this appearance of a non-existent, lifeless, unreal, illusory world, which houses and includes the Earth and all bodies and objects. All of these things can ONLY seem to exist, WITHIN the absence of light, AS the absence of light, and only so long as the light is absent. They are "made of darkness", lack, emptiness, absence, NOTHINGNESS. They are not made of light. And darkness is only an illusion. It's a strange hallucinated imagined appearance of what it would look like IF light could be made to be absent.
When you are in a dark room, and you switch on the light, what happens to the darkness? Does it go somewhere? Does it turn into light? Is it retained? Does a chunk of it still persist in the light? Are its dark forms and shapes kept? No. The light DISPELLS them. They simply vanish. They "cease to seem to be." They don't transform into light. They just disappear. They are the OPPOSITE of the light and do not really exist. When the light is allowed to shine, the darkness or "lights absence" is corrected, light is supplied, and there is nowhere - no gap or hole - in which the darkness could SEEM to exist.
The world, including the Earth, all its forms, creatures, oceans, forests, the moon, the sun, the entire galaxy and all the thousands of galaxies, the void of space and all of time, are all symptoms or side-effects of what it seems to look like when light is absent. They are HELD in place by minds who are resisting the light and trying to enforce a blockage or denial of the light. When these minds come around and are healed, they will no longer desire that light be absent, and so there will be nothing "to keep a separated world in place." Without an active resistance to the light, there is nothing to prevent light/love from entering and dismissing the illusion that darkness exists. OR the illusion that the world exists.
It does not matter in the big picture whether you view this world through false perception or true perception. It does not matter whether you glimpse the real world or see the world as wholly forgiven and benevolent. "A forgiven world cannot last" because the world is nothing but "a thin veil over the face of Christ." When the light shines brightly enough, the dark veil that LOOKS LIKE a planet, will become transparent, thin, like a puff of smoke which can easily be dispelled. The entire universe, all forms of matter, all objects and bodies, will become increasingly invisible. As though you are pushing past a thick heavy curtain which is finally parting to reveal the LIGHT behind it which it was BLOCKING.
The world, including Earth, IS nothing but a blockage to the light. It DEPENDS ON the light remaining blocked in order to SEEM to exist at all. It is MADE OF and exists only WITHIN the illusion of darkness. Nothing about it is real. Nothing about it is light or life. It's a shadow. What happens to shadows when the light shines? They do not exist. They are REPLACED with light. The ego is where the darkness WAS. The world is where the darkness WAS. Bodies are where the darkness WAS. And they absolutely DO NOT EXIST in the light.
Being MADE OF darkness, if you take them to the light they will be dissolved, shone away. "Illusions recognized must disappear." "The body cannot remain without illusions." Try taking an illusion of light's absence INTO the light, and it cannot remain. Its nature, which is light's absence, IS INCOMPATIBLE WITH HEAVEN'S LIGHT. It is THE OPPOSITE of Heaven's light. Never the two shall meet. "Earth, Heaven's opposite in every way."
The closer you approach the light which is BEYOND the body and BEYOND the world, behind them, the world will become less and less of an obstacle. It will seem less and less heavy or serious. It will seem to become lighter, itself, as its transparency begins to allow the light BEYOND it to shine through. As you begin to "see God in everything you see" because God is BEHIND the things you see. The things you see are BLOCKS to God. To forgive them is to OVERLOOK them (NOT SEE THEM) and to see PAST the "granite block of sin" (the veil of matter) TO reality.
"Unity alone is not a thing of dreams (not Earth). And it is this God's teachers acknowledge as **behind the dream**, **beyond all seeming** (behind the world) and yet surely theirs." It is the light BEYOND hell/dream/darkness/Earth that appeals to you, it is that light which you WANT to see, it is that light which is coming from ANOTHER WORLD (Heaven), and it is that light which is God which you see "in" or "through" or "behind" the things you see, while you are traveling TOWARDS the light.
As you move closer and closer to the light BEYOND the veil of matter (wall of sin), the veil dissolves. The veil ITSELF (the world you made - including Earth) thins out, stops seeming so solid, stops seeming to represent "real sin" or "real guilt", and it in a sense will seem to stop looking like "hell". It may even seem to become lovely or holy. But the loveliness is not there AS the world which is still made of darkness, it is there because there is increasingly LESS darkness (world) and increasingly more light (Heaven), revealed through spiritual sight/vision in parallel to the darkness that the body's eyes see.
The FORGIVEN WORLD is the thinnest, lightest, least dense, least heavy view of the SHADOW WORLD that's possible, while still seeing it. It's a perception of the ILLUSION of light's ABSENCE, in which the light is barely absent at all, such that the illusion seems to slightly remain as a THIN VEIL over Christ's face, and Christ's face is almost fully seen.
The forgiven world, Earth and spacetime, grows lovelier ONLY because it is DIMINISHING, and only because a loveliness is shining FROM BEYOND IT, coming from behind it, as the veil of matter dissolves. It is the SOURCE of the light that you want to get to. Just because the forgiven world seems illuminated BY this holy light, does not MAKE IT holy. It is NOTHING. It merely becomes like a spotless mirror in which you see a *reflection* of the light of Heaven, where it is obscuring the light the LEAST while still seeming to slightly exist. Once the light of Heaven beyond the world world/veil shines FULLY, the veil LIFTS, the face of Christ is seen, the WORLD IS FORGOTTEN, there IS NO WORLD, and Heaven is uncovered at last. And it is Heaven that you want.
Here, all the things made of death and darkness are shone away into oblivion, the "world spins into the NOTHINGNESS from which it came", the stars disappear in light, the dark world of shadows vanishes, the world is consumed by the light, shone away because the world is nothing but an ILLUSION of light's absence, and light's presence forces the impossible world to cease to exist and "Heaven is all that remains."
Not one single FORM of darkness (matter, energy or otherwise) remains in Heaven because ONLY LIGHT can remain in Heaven. "Gone are bodies in the blazing light of the Son of God." "Gone is perception". "Gone are walls" (objects, planets). "Nothing there is seen, only known." The Kingdom of God in all its glory. It was merely HIDDEN behind the blocks to love, the illusion of sin, which took the temporary illusory form of worlds and planets and bodies, made "as a place where God could enter not". These walls must go. Matter is an illusion. Spacetime is an illusion. Death is an illusion.
THERE IS NO WORLD. THIS IS THE CENTRAL LESSON THE COURSE WOULD ATTEMPT TO TEACH. Means simply... there is no shadow, no darkness, nothing OPPOSING the light. There is ONLY the Light of the Kingdom of God.
"Forget not the Kingdom of God for anything the world (physical) has to offer. The world can ADD nothing to the power and the glory of God and His Holy Sons, but it can blind the Sons to the Father if they behold it. You cannot behold the world and know God. Only one is true." ... "Nothing so blinding as perception of form" (objects, bodies, planets).
To behold (see) the world (Earth and space) in ANY way, is to be blinded to God. Not one single FORM, object, body, or planet, can remain in your vision if you are to experience God. You cannot keep the world, or the body, and be with God. "God cannot enter a body, nor can you join him there." "To be without a body is to be in your natural state." To be in/with/having a body is unnatural because the body is darkness (" in the body's darkness"). "The barren sands, the darkness, and the lifelessness are seen only through the body's eyes."
Light is natural. Light is eternal life. Light is your home. Light is what you are. "Eternity will shine away the world."