Such defenses are put in place on purpose. They are chosen. They have a purpose, to fulfill a perceived need. They have a function - a task that they are to perform in order to achieve a goal.
The goal of sickness is to defend you or protect you or counter-attack against something you have perceived which seems to threaten your existence. Isn't it strange that a retaliation against a perceived threat damages you?
Sickness is not just some thing that happens. It is a device, a deliberate mechanism or tool that you use for a specific purpose. Like a bandaid, you use it to help your little wounds to heal. Or a screwdriver, you use it to help screw screws into wood. Sickness helps you to be protected against what you perceive as an attack.
Sickness implements separation. It pushes away the attacker and creates a gap or distance between you, so that you feel a sense of perceived safety. You want to put distance between you and the threat. Or put up a really solid wall that blocks them. These blocks are blocks to awareness.
The result is what expresses as a materialization of physical form in a distorted configuration, which is what we usually refer to as "sickness", illness or disease. The mind is literally warping the body to try to turn it into a defense mechanism.
The ONLY purpose of sickness is to defend you. This is the only reason why you want it. And it is the reason why you really have an actual desire to keep it. If you were to remove the defense, and if the attacker is still present without having changed at all, then you will be in danger.
You will also go to great lengths to build an entire fictional story around the symptoms of sickness explaining and justifying why the sickness ITSELF is the problem that you want to get rid of, in order to DENY that you really want to KEEP it, because to truly get rid of it would expose you to your enemy. We will make a lot of noise about the unfairness of the sickness and about how we did not ask for it, in order to HIDE the fact that we did ask for it on purpose and we are the ones who put it in place. To admit that would threaten to undo it, which goes against the entire point of us creating the sickness in the first place.
You do not want to remove your defense because of this. It is creating an illusion of safety and protection, further covered-up by layer upon layer of denial and displacement of what the real problem is. Unfortunately, all defenses are attacks and your own defenses are attacking you as much as the other. Construct a razor-wire fence and you better be careful not to touch it!
The only purpose of that defense is to block a threat. You must look at what it is that you believe is a threat. Typically it is anything which your ego perception mis-perceives as the opposite or undoing of itself. Your sense of identity is at stake. Any suggestion of "truth" which implies that the ego does not exist, will threaten "you" when you are identified as the ego.
Your false beliefs are your artificial identity which you believe are the truth. You want to protect that truth as though your life depends on it. You see its opposite as false, evil, and an attack. So long as you remain loyal to those misperceptions you will defend them, even if doing so requires you to implement defenses which attack you as much as anyone else. All defenses are double-eged swords and you cannot escape their toxicity and potency.
What must be truly undone before you will be willing to let down your defenses, is to learn to accept the truth as it is and not as it appears to be when seen through the ego. This will have to mean that your sense of identity is mistaken and must be set free. It must shift from "I am this ego thing" to "I am holy and innocent". Forgiveness must happen of yourself, and healing must take place in terms of how you see yourself or who or what you regard yourself as.
You need to find a willingness to be open to being mistaken about who you thought you were, and what you thought was true, so that you can allow the truth to save you from this illusion. The truth will show you a new identity and reveal the truth about you. This will reveal how the ego is in fact the thing which is false, and that it is not who you are.
If you can accept the truth as helpful and welcome instead of as a threat to your existence, you will see no NEED to defend yourself against it. You will not see attack in it, having not attacked. You will see no justification for trying to prevent it or reject it. You will accept it and allow it to be in you. You will invite it in and it will be your Identity.
At this point you will be WILLING to accept that your device of defense and separation is no longer needed. It's function is irrelevant. The sickness was ONLY serving your purpose of trying to protect your "self". You no longer need this protection because who and what you are is not being threatened by the truth but is in agreement with it. The truth is your friend. You can now let down your defenses.
This means, you will now admit that the sickness only came into being because you put it there, wanted it, needed it, and it was helping you - or so you thought. You have now been corrected and you now RECOGNIZE that this sickness was just something you used to believe in and no longer do. It is now false. It is not the truth. It is not something you need. You have not purpose for it and you admit that it is just a way of attacking yourself more. You don't want it anymore and don't have any attachment to it.
Illusions recognized as such MUST disappear. All of the symptoms and consequences of that so-called "sickness" must disappear. "He will undo the consequences of my wrong decision if I will let Him" - meaning that your willingness now to admit the truth (allow Holy Spirit access) can and will supernaturally UNDO and make disappear all forms and signs and symptoms and content of sickness. All of the expressions - consequences - of deciding poorly will be undone. Your lack of support or need for the sickness will let it go and it will just vanish.
Properly recognized as completely false, unhelpful, unneeded, unwelcome, pointless, futile, purposeless, meaningless, and utterly useless, the sickness will be recognized as having no reality or truth or validity and this will make it disappear. Literally. All symptoms will go if this is truly deeply accepted.
The sickness was nothing more than a temporary protective device which you wanted and needed. If you don't need it, you WILL drop it. If your will is genuine and you've become really really honest with yourself, that sickness will be undone. And sickness is nothing more than a belief that separation is the answer to God, or that separation can save you from the truth. Undoing sickness heals your mind.
Once the sickness - as mental illness - as belief in separation - AND as symptoms of defense - is gone, THEN you will be at peace. Not before. No-one can be at peace when they are at war with themselves or with the truth. No-one can be at peace who believes sickness is real and must just be accepted. No-one can be at peace who is using death as a defense against the wrath of God. True peace can and must be experienced as complete and total perfect "health" in mind and all the expressions of mind.
If you truly do not believe in separation from the truth, you will have no defenses and you will not exhibit symptoms of sickness. You will walk your walk and not just talk your talk. And you will demonstrate therefore, by example, living example, that you are immortal and invulnerable because you do not believe in separation or sickness and they are not real. You will thus teach others that sickness is not the truth and the truth needs no defense. If signs of sickness remain, you are teaching the exact opposite because, in all honesty, you have not completely undone your belief in separation.
Sickness must go. Disease must be healed. Death must be undone. Resurrection is the only truth. If you are sick you are attacking yourself, everyone else, and God. A guiltless mind cannot suffer, and a guiltless mind exhibits no symptoms of sickness or damage. A broken body is a sign that the mind has not been healed. Complete healing is not only possible but necessary. You must teach that nothing has happened to you and you can't do that intellectually. You must show it and act like it.