You are not of this world. This world isn't the only world.
You are of another world, the Kingdom of God, in which you have immortality - eternal life as given by God Himself.
This world is an illusory world. It's kind of like a layer on top of reality. A pretend world, a picture, of a form and nature opposite to reality.
The things in the illusory world can appear to change, shift, grow, die, etc. But it really has no effect at all on the deeper underlying world of God. God's Kingdom is completely permanently unassailable and impenetrable and perfect forever. It is "the living world of light."
"This aching world has not the power to touch the living world at all. You could not give it that, and so, although you turn in sadness from it, you cannot find in it the road that leads AWAY from it, into another world. But the REAL world HAS the power to touch you even here, BECAUSE YOU LOVE IT."
"Let your Guide teach you their unsubstantial nature as He leads you past them, for beneath them is a world of light whereon they cast no shadows."
What you are, as an immortal spirit, is firmly anchored in Heaven. Nothing can attack you or change you in any way.
"The Thought God holds of you is like a star, unchangeable in an eternal sky. So high in Heaven is it set that those outside of Heaven know not it is there."
For you as an immortal being, death is not possible. It's not an option. You cannot choose it to happen to your spirit. Your spirit is invulnerable.
So what is it that can ever die, or seem to die? It can't be you. A body is an illusion, part of the illusory dream world of death. Everything in the dream world is made of illusions and all illusions are the idea of the opposite of reality. Since reality is life, all illusions are the idea of death.
"Without the idea of death there is no world."
"Death is the central dream from which all illusions stem."
So we know that every illusion, whether it appears to show up as a healthy body, or a sick body, or a dead body, or no body, or even just an environment, or a planet, is still essentially made of the idea of death. Even Earth is the idea of an opposite to God's Kingdom.
"Earth, Heaven's opposite in every way."
So from the outset, since what you are cannot die whatsoever, the things that can seem to die cannot even be who or what you are. You are spirit, not a body. You exist on an entire other level.
So really you do not need a body, it adds nothing to you, it doesn't improve you, it doesn't allow you to do things that you couldn't do already, and it only essentially was designed as a limit. It can be used in different ways, by an immortal spirit, but the body is not ever what you are.
As spirit, and being on a higher level, you have power over everything on the lower level of the illusory world. All of the world's laws are secondary and once-removed. This world is not primary reality, or the starting point of anything. It is not a cause but an effect of a higher mind's dreaming.
So this means, you on the level of Christ, have power over, total power over, everything in the world. That includes the body, it includes all states of sickness and death, it includes matter and energy, it includes all of the so-called laws of physics and biology, and in effect you have power over everything in this universe.
"It is your thoughts alone that cause you pain. Nothing external to your mind can hurt or injure you in any way. There is no cause beyond yourself that can reach down and bring oppression. No-one but yourself affects you. There is nothing in the world which has the power to make you ill or sad, or weak or frail. But it is you who have the power to dominate all things you see by merely recognizing what you are."
""My Self is ruler of the universe." ... It is impossible that anything should come to me unbidden by myself. Even in this world, it is I who rule my destiny. What happens is what I desire. What does not occur is what I do not want to happen. This must I accept. "
Since you have power over everything in the universe, "there is nothing my holiness cannot do", "what the Holy Spirit enables you to do is clearly not of this world.", you get to dictate what happens to the body. You, from a higher more vertically causal level, get to choose how to USE any aspect of this secondary world.
You can choose to use the body to attack through, which is a toxic idea which affects the body and attacks it. This produces sickness and death of the body on this level. The body then conveys the idea that being dead is the only truth.
You can choose to use the body to heal through, which is a healing idea which affects the body and heals it. This produces a picture of a healed body, an illusion of a healthy body, which then demonstrates the thought/belief that being alive is the only truth.
So your mind gets to decide whether or not the body dies. And this depends entirely on what you use the body FOR. If you use it for attack it will be attacked. If you use it to heal it becomes healed. And in its healed condition, sustained by the mind, sickness death cannot "happen" to the body against your will and your power.
"You cannot die unless you choose to do so."
"No one dies without their own consent"
"You cannot be hurt unless you hurt yourself."
"The mind being sane heals the body."
"Now is the body healed by miracles."
So in effect, you could choose to use the body for healing and to symbolize eternal life, resulting in it being healed. By the power of your mind, the body is not allowed to be in a state of sickness, yet alone physical death.
The body can be sustained indefinitely, at least in time. It can't be eternal because the mind has to constantly maintain it and it is not natural to constantly project bodies. It could stick around for a million years if the mind so chose. Aging can be reversed and halted. But eventually once the purpose of healing is fulfilled in the help of others, there is no longer a need for a body to use to reach those who dream of death. Its purpose of healing is part of the atonement plan.
"Illusions recognized must disappear"
"Eternity will shine away the world."
"A forgiven world cannot last."
"The body cannot remain without illusions."
When the entire idea of death, which the world and body is founded on, is recognized, it must disappear. When it is no longer useful for the atonement plan, and all souls have returned home, there is nothing more to keep the world intact. Nor is there any need or will to maintain it.
"A world forgiven cannot last. It was the home of bodies. But forgiveness looks past bodies. This is its holiness; this is how it heals. The world of bodies is the world of sin, for only if there were a body is sin possible. From sin comes guilt as surely as forgiveness takes all guilt away. And once all guilt is gone what more remains to keep a separated world in place? For place has gone as well, along with time. Only the body makes the world seem real, for being separate it could not remain where separation is impossible."
You don't have to automatically go towards physical death. Death is a choice made by an immortal being pretending it can die. You cannot die. "Sickness is an attempt to prove you can be hurt." "Swear not to die, you holy son of God. You've made a bargain that you cannot keep."
"You are immortal and you cannot die. But you can confuse yourself with things that do."
There is no point choosing to make death happen when you acknowledge that you already have eternal life. What sense would it make? It would be not only futile but a completely pointless waste of time. If you knew you could NEVER die, would you CHOOSE to attempt to make death happen? That's what we do when we cause sickness and death. And if we were to never do that, would sickness or death happen?
No. Because there are no other causes of it. The only cause of death is your mind's power to choose to attack through the body. If you don't do that, the body cannot physically die or become sick.
"Because it is holy it cannot be sick, nor can it die. When its usefulness is done it is laid by, and that is all. The mind makes this decision, as it makes all decisions responsible for the condition of the body"
"hTe body can become a sign of life, a promise of redemption, and a breath of immortality to those grown sick of breathing in the fetid scent of death. Let it have healing as its PURPOSE. Then will it send forth the message it received, and by its health and loveliness proclaim the truth and value that it represents. Let it receive the power to represent an endless life, forever unattacked. And to your brother let its message be, "Behold me, brother, at your hand I live."