"No one can suffer loss unless it be his own decision. No one suffers pain except his choice elects this state for him. No one can grieve nor fear nor think him sick unless these are the outcomes that he wants. And no one dies without his own consent. Nothing occurs but represents your wish, and nothing is omitted that you choose." - Lesson 152
This is an extremely black and white level of responsibility. If you give your CONSENT, then sickness and death will occur. If you do NOT give your consent, then sickness and death of the body become IMPOSSIBLE.
Paraphrase: What you use the body for it becomes to you. If you use it to attack it becomes weak and sick and dies. If you use it for love it is healed and sickness is reversed and death becomes *IMPOSSIBLE*. "A sane mind heals the body."
This as Jesus says is a CENTRAL TEACHING of ACIM - that sickness and death of the body are OPTIONS THAT YOU CHOOSE (or not).
The body is not supposed to die or go through the death process. The body is not supposed to get sick. Death is nothing but another more extreme form of sickness, and sickness is just an earlier form of death. It's all the same thing. The ego mind attacks and kills the body as a result of a belief that sin and death are real, in an ARROGANT attempt to symbolically kill the Son of God. If you do not have that belief, you will not attack the body, it will not become sick, and it cannot die.
"Use it (the body) to bring the Word of God to those who have it not, and the body becomes holy. 5 Because it is holy it cannot be sick, nor can it die. 6 When its usefulness is done it is laid by, and that is all. 7 The mind makes this decision, as it makes all decisions that are responsible for the body's condition."
The mind makes ALL decisions about the body's condition, including whether it is sick, and whether it dies. It CANNOT DIE if the mind does not CONSENT and CHOOSE to kill it. "From the ego came sin and guilt and death" .... "The glitter of guilt you laid upon the body would kill it. For what the ego loves, it kills for its obedience".
The body then becomes a "symbol of immortality" in the dream, as a DEMONSTRATION that your mind truly believes in God's laws over the egos. It is useful purely as a communication device.
"The body's health is fully guaranteed, because it is not limited by time, by weather or fatigue, by food and drink, or any laws you made it serve before. You need do nothing now to make it well, for sickness has become IMPOSSIBLE."
You will then retain the body, which is really nothing, but in this state effectively is invulnerable and cannot be destroyed. This produces a supernatural protection because "a broken body is proof the mind has not been healed" and therefore if the mind IS healed it WILL heal the body. It must.
"Yet this protection needs to be preserved by careful watching. If you let your mind harbor attack thoughts, yield to judgment or make plans against uncertainties to come, you have again misplaced yourself, and made a bodily identity which will attack the body, for the mind is sick."
When you have ceased attacking the body, "a sane mind heals the body", the body will be restored miraculously to "perfect health" and become "holy", in the dream. It is used to bring God to those who need help, to perform miracles and raise the dead. And then when its usefulness is done, the body is DISAPPEARED, not laid down on the ground to rot and die. The dream of death is not left by death, but by truth.
Anyone whose body dies does so because THEY BELIEVE IN DEATH AND HAVE CONSENTED TO DIE. Death is a choice against God's Will. Death is NEVER a doorway out of dreaming. Death is DENIAL OF GOD.
Jesus describes how he finished dreaming not through death but through the recognition that the body was nothing/illusion and thus made it literally disappear:
"My body disappeared because I had no illusion about it.. It merely became what it always was. And that is what 'rolling the stone away means.' The body disappears, and no longer hides what lies beyond... To roll the stone away is to see beyond the tomb, beyond death, and to understand the body's nothingness. I did assume a human form with human attributes afterwards, to speak to those who were to prove the body's worthlessness to the world. This has been much misunderstood. I came to tell them that death is an illusion, and the mind that made the body can make another since form itself is an illusion. They did not understand."
Death of the body is optional and is a FAILURE to live according to the Will of God. Whatever you believe you demonstrate. If you demonstrate death, you MUST believe in death. If you do not believe in death, you CANNOT demonstrate death. We are to demonstrate "immortality" of the body, in the dream, before we can stop dreaming. "There is no death, the Son of God is free" applies ONLY AFTER PROVING IT by making the body free of death, as demonstration of your actual acceptance that you are under no laws but God's.