Let's talk about sickness purely as a matter of cause and effect. Your mind is causal, and when sane has no confusion about this fact. It does not mistake its own effects for causes, and especially does not believe its effects are causing it.
When the mind is sick, it uses denial to block out of awareness its own causal power. This is a denial of creative power or authorship. The mind REVERSES cause and effect. It believes it is not the cause of the effects, and it believes the effects are the cause of it.
The mind now perceives itself is "at the effect of" an external, separate cause. There are two very important things happening here:
1) The mind now sees itself as being an effect, and begins to distort the body in order to represent those effects. The mind believes it is caused by, and under attack by, an external cause, and that this cause defines the self. And the mind, under this perception, now subconsciously PRODUCES SYMPTOMS in the body. These symptoms are the expected effects that the mind believes "should" be the result or causal consequence of the external cause (which is secretly the mind itself).
2) In order TO believe that the mind is at the effect of the world or another person, the mind HAS to assign causality TO the world or person. And that means, that person is believed to be RESPONSIBLE FOR CAUSING the effects in your body. By being "the causer", they are effectively "the sinner". And so the mind sees "their will" as causing the effects that it, itself, is putting into the body based on this belief. By seeing itself as under attack, the mind thus ACCUSES its brothers of sin SO THAT it can pin the blame for the effects on your brother.
This results in an unfortunate scenario because now the presence of "effects" in the body, put there BY YOUR MIND, are acting as the "consequences" or cause-effect RESULT, of what SOMEONE ELSE DID TO YOU. This belief is inescapable because it's founded on the reversal of cause and effect. You can't see yourself as victimized and "at the effect" WITHOUT a scapegoat to pin the causality on. And that leads to this simple fact.
"Sick bodies are accusers."
The presence of sickness in your body is part of a dynamic of believing that your brother is the cause of you. And there is another way to put that. Your mind is ATTACKING YOUR BROTHER, by believing that he is the cause of you. Your mind ATTACKS HIM through the body, by assigning to him a causal power OVER you, which he does not have. And because causality is closely tied to sin, the idea of "who did it" .... this is nothing short of accusing your brother of SIN.
And we know WHY a person would accuse a brother of sin. "You but accuse your brother of your OWN sins." Which means that as soon as the mind is going into an attack mode, it believes in its own sinfulness and then PROJECTS this onto your brother THROUGH the reversal of cause and effect. The cause effect reversal is an absolutely essential part of the dynamic and it produces a perception that HE DID THIS TO YOU, and now YOU have the effects to show for it, which act as PROOF that he DID SIN. And this leads to a simple fact.
If your body is showing up as sick and damaged, IT IS accusing your brother of sinning against you, and it's doing so because YOUR MIND is accusing him of causing you. In every case. Without exception. The body's state is part of the mind's accusatory condition. If the mind believes your brother is the cause of your experience, your mind WILL MAKE YOUR BODY SICK TO PROVE IT. And you are now WILLING to suffer and tolerate sickness in the body in order to be able to get away with accusing your brother of sin. And in fact, we will even go so far as to KILL the body through "death" in order to ACCUSE the world or a brother of sin, "suggesting" that we "died innocently" against our will.
"A sick and suffering you but represents your brother's guilt; the witness which you send, lest he forget the injuries (that means PHYSICAL!) he gave, from which you swear he never will escape. This sick and sorry picture (body=picture) YOU accept, if only it can serve to punish him. The sick are merciless to everyone, and in contagion (that's physical too!) do they seek to kill."
So sickness, all physical sickness, all symptoms, goes HAND IN HAND, with a psychological sickness, which is a condition of believing that cause and effect are reversed. And all such level confusion is EGO. Anyone with an ego is going to attack their own body in an effort to portray themselves as VICTIMIZED, so that OTHERS will stand accused, and thus YOU will appear to be innocent and exonerated. In sickness and damage we then are able to claim, "I DID NOT DO IT, YOU DID". And this is described be Jesus as this attitude:
"Brother, at your hand I die". Ie, because my brother is believed to be the CAUSE of me, and because I have secretly manifested EFFECTS in my body to PROVE it, I now die BECAUSE of my brother. And there IS NO death that isn't "caused" by this precise mechanism. It happens because of the MIND choosing to USE the body for attack against others, which results in sickness and death. This is explicitly stated by Jesus:
"The central lesson is always this; that what you use the body for it will become to you. Use it 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."
"The sick are merciless to everyone, and in contagion do they seek to kill. Death seems an ***easy price***, if they can say, "Behold me, brother, at your hand I die."
So we're talking here about the assumption that you HAVE a body. I'm not talking about whether the body is real or not. *IF* you have a body, HOW YOU USE IT is vital. If you use it for attack, ie belief in sin, thus denial and projection, thus reversal of causality, you are using it to attack THROUGH towards your brother. And he now is seen as the CAUSE OF your sickenss. Or at least, he is now the scapegoat onto whom you BLAME for causing your sickness. And your BODY is forced to be sick BY YOU, and accuses him right along with your mind.
Now the question becomes, what happens if you DO NOT DO THIS?
What happens if you stop using the body for attack? What if you stop reversing cause and effect? What if you stop seeing yourself (mind) as "at the effect" of the very things you are causing? What if you recognize:
"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."
Nothing in the world has POWER OVER YOU. Which means nothing in the world CAUSES you. Which means nothing in the world SINS against you. Which means, if you accept this and SEE this way, if your mind is SANE in recognizing IT is the cause of everything ("my self is ruler of the universe"), then it WILL NOT enter into the above described dynamic of USING the body for attack.
This means the mind will now NOT see your brother as causing you. It will NOT see itself as being "at the effect" of the world. It will NOT BELIEVE IN EXTERNAL CAUSES OF SICKNESS. It will not attribute to the world ANY power to cause it to be in any state. It will not see itself as "affected". And what are the CONSEQUENCES of this?
"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."
"The mind, being sane, heals the body."
In other words, because YOUR MIND was the ACTUAL cause of THE EFFECTS in your body, as a result of ITS misperception of your brother, and as part of USING the body for attack (to accuse him physically), the removal of this attacking attitude HEALS the body. It takes AWAY from it all the signs of attack and sickness. It stops seeing itself AS "effect". It stops believing in effects. And it stops making itself suffer. This CAUSES love to flow through the body to others. This joins minds. This then RESULTS IN the disappearance of the SYMPTOMS, as PROOF and CONVICTION, that the mind no longer wishes to attack, and therefore **REFUSES** to display signs of attack in the body.
You have to at this point let go of the belief, which is wrong, that the body is CAUSED to be sick BY anyone other than YOU. You also have to let go of the belief that the body can become sick as a result of some cause or power IN THE WORLD. NOTHING in the world has that power to make you weak or frail. Death does NOT OCCUR by accident, NOR does it occur "because of" ANYTHING in the world. Death occurs ONLY by a mind using the body for attack, sending attack through the body, making the body DEPICT ATTACK, and thus destroying it for the sake of some scapegoating.
If there is any shred left in your mind of a belief that sickness is caused by ANYTHING other than your mind's mis-use of the body, you will NOT be able to accept the next step. Which is to realize that when the mind USES the body FOR HEALING, to bring the Word of God to others, to shine light through it, to extend the mind PAST the body, the body actually GETS HEALED. Not only does it get healed, it CANNOT AVOID IT, has no will to choose not to, and MUST heal in order to NOT scapegoat. It cannot be retaining proof of sickness and CLAIM to be coming used by a healed mind.
Once again, explicitly stated by Jesus here:
"Learning must lead beyond the body to the re-establishment of the power of the mind IN it. This can be accomplished only if the mind EXTENDS to other minds, and does not ARREST ITSELF in its extension. The arrest of the mind's extension is the cause of all illness, because ONLY EXTENSION IS THE MIND'S FUNCTION. ***Block this, and you have blocked health*** because you have BLOCKED THE MIND'S JOY."
So when you withdraw from your brother in attack, when you see separation in him, when you ACCUSE HIM OF SIN, when you scapegoat him, and when you try to make YOUR body sick so that HE is the accused sinner, you arrest the extension of the mind. The mind begins to fixate on the body and sees itself as the body. The body now is attacked and becomes SICK. Illness is the result, and this illness is a part of the mechanism of accusing OTHERS of sin as part of the scapegoating mechanism.
ALL SCAPEGOATING MAKES YOUR BODY SICK.
ALL FORGIVENESS HEALS YOUR BODY'S SICKNESS.
When the causality is corrected, the mind now USES the body for extension of love, this de-emphasizes the body, it lifts away from the body all PHYSICAL PROOF of attack and pain, and the body now is restored to literal physical heath.
"The Holy Spirit's picture changes not the body into something it is not. It only takes away from it ***ALL signs*** of accusation and of blamefulness." What are the signs? PHYSICAL SYMPTOMS OF SICKNESS. The holy spirit REMOVES the sickness from the body, so that it can ONLY depict health. It now becomes a SYMBOL of eternal life, in the world, which ONLY TEACHES that your brother is INNOCENT. Which means, a HEALTHY body, DEMONSTRATES, PROVES, that the MIND occupying that body IS HEALED, that mind IS NOT STILL attacking, and so the symptoms and signs of attack are gone. If the signs remain, the mind HAS ABSOLUTELY NOT been healed, because the signs ONLY show up when the mind is sick.
The Holy Spirit LITERALLY wants you to SHOW YOUR BROTHER a HEALTHY BODY. A healthy body is a symbol of innocence and forgiveness in this world! This again is EXPLICITLY stated by Jesus:
"Now in the hands made gentle by His touch, ***the Holy Spirit lays a picture of a DIFFERENT you. It is a picture of a body still***, for what you REALLY are can not be seen nor pictured. But THIS one has NOT been used for purpose of attack, and therefore never suffered pain at all. IT witnesses to the eternal truth that you can not BE hurt, and points BEYOND itself to both YOUR innocence and HIS."
Let's repeat it.
"the Holy Spirit lays a picture of a DIFFERENT you. It is a picture of a body still" ... "THIS one has NOT been used for purpose of attack, and therefore never suffered pain at all."
That literally means that the Holy Spirit will heal all physical sickness so that your body can ONLY SHOW symbolic innocence and total lack of harm or attack to your brother. Add by doing so, the body now becomes a teaching device, which PHYSICALLY relays a message of healing to your brother.
"The 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*** (no physical sickness). And to your brother let its message be, "Behold me, brother, at your hand I live."
THIS is the ONLY appropriate state of the body for a HEALED MIND. God's teachers, God's miracle workers, WILL always have a healed body. If they don't, their mind is not healed.
"Show THIS unto your brother, who will see that every scar is healed, and every tear is wiped away in laughter and in love. And he will look on his forgiveness there, and with healed eyes will look BEYOND it, to the innocence that he beholds in you. Here is the proof that he has NEVER sinned; that NOTHING that his madness bid him do was ever done, or ever had effects of any kind. (all physical effects are GONE, miraculously!) That NO reproach he laid upon his heart was EVER justified, and NO attack can touch him with the poisoned sting of fear. Attest his innocence and NOT his guilt. YOUR healing is his comfort and HIS health. BECAUSE it proves illusions were not true."
This is what A Course in Miracles teaches. A sick mind WILL attack the body and make it sick and dead, ALWAYS in an effort to ACCUSE others of sin. Sickness is scapegoating! And when the mind STOPS doing this, it sends healing and health through the body which REVERSES the effects and straightens out the cause-effect relationship, thus TAKING AWAY the sickness which the mind put there in the first place.
"They can heal the sick and raise the dead because man himself made both death and taxes (strain and sickness), and can abolish both."
Your mind CAN MAKE SICKNESS.
Your mind CAN REMOVE SICKNESS.
If your body is sick, your mind IS STILL using it for attack. Which is why "a broken body shows the mind has not been healed."
If your MIND is healed, it MUST AND WILL ALWAYS heal the body. Because "a sick body makes no sense."
The mind WILL NEVER keep the body sick on purpose unless it is attacking. The body cannot stay sick on its own. There are NO causes of sickness beyond your mind. Nothing in the world MAINTAINS body sickness. The body is not an end in itself, or a thing, or a living entity. It is a SYMBOL.
"The body is the symbol of what you THINK you are. It is clearly a separation device, and therefore does not exist."
"Regarding the body as an end, it has no real use for it at all, because it is not an end."
The body only EVER SYMBOLIZES what the MIND is doing. It does not have its own STATE or continuity. The mind is AT ALL TIMES determining the health of the body. And the only way to have the body be constantly sick is to be constantly attacking with it. As soon as you stop attacking yourself, the sickness MUST DISAPPEAR to SYMBOLIZE forgiveness. "Sickness is a defense against the truth" - no defense, no sickness!!! If you want TRUTH, you will NOT have defenses, and thus NO SICKNESS.
There are no exceptions.
Healthy mind, healthy body.
Sick mind, sick body.
This is the central lesson.