Let's take a look at these statements about overcoming death.
1) "When you learn to make ME manifest, you will never see death. For you will have looked upon the deathless IN yourself, and you will see only the eternal, as you look out upon a world that cannot die."
2) "The body cannot live nor die, because it cannot contain you who are life. If we share the same mind, you can overcome death because I did."
3) "The central lesson is always this; that what you use the body for it will become to you. Use if for sin or for attack, which is the same as sin, and you will see it as sinful. Because it is sinful it is weak, and being weak, it suffers and it dies. Use it to bring the Word of God to those who have it not, and the body becomes holy. 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."
These statements make sense when seen from the perspective of True Perception. Bear with me while I think out loud...I'm still fleshing this out....
I will use an analogy to describe what the illusion of a world is. Imagine that the entire world is all one color. It's made of all one single material. It is mostly transparent. Let's say absolutely everything is made of glass. All the trees, bodies, animals, clouds, oceans, mountains, everything is made from this same material and it all looks the same.
Other than certain shapes which are formed by this worldwide material, there is absolutely nothing different about any part of it. It's all made of the same stuff. Also within this world, any illusions of one object causing another are completely overlooked and ignored.
In no way and under no conditions can any part of this world do anything TO any other part. ALL of it is just an effect, inert, lifeless, void of will. It is just a static image. It does nothing at all. There is nothing attacking anything else, because you recognize that all parts are coming from the same material, made by the same person, seen in the same way, and nothing can really do anything to anything else. There is no cause within that image of a world itself, the cause of it is outside of it. It is being PROJECTED within your mind and you are its sole cause. A frozen dream.
This is basically what you will see the world AS when you attain full True Perception. When you then look from this perspective, you will see that ALL illusions within the world are equal. In this way, THERE IS NO DEATH. Ie, this image cannot live, this image cannot die, it just remains being an image. This image cannot contain you in any way, who are life, because what is LIFE has nothing to do with forms or bodies or images. Images of bodies being in one state or another are all the same.
That said, as Jesus explains, when the mind is not using the body for sin, which means, attempting to confuse levels and reverse cause and effect and to make out that some part of this IMAGE of a world is able to attack another, then the IMAGE of that body will change to represent sickness and death. It will be seen as containing weakness, and thus it will seem to weaken, become sick, and die.
When it is not being used for purposes of *false perception*, it will not be distorted or unnaturally forced to be SICK. It will just be seen as perfectly neutral and free of attack. And because it is free of attack, it cannot be attacked. Or rather, in recognizing attack is not REAL, symptoms of attack will not show up in the image. Thus the body image will show up as having "natural health".
Jesus talked about how when he recognized his body for what it is, it could not disintegrate. It was not alive because illusions are not life. It could not die because there was no attack projected onto it. He therefore simply saw the end of its usefulness, laid it down and MADE IT DISAPPEAR, because he saw it was nothing but an illusion/image which was *not really there*. The image of the body, while showing up as part of the dream world, was essentially incapable of sickness, aging, change, or death, even within time and space.
I feel I don't quite have this whole picture yet, but it's a work in progress. Feel free to correct or add to this if you see fit. I'm gradually forming a clearer picture of how this all fits together.