Your mind is always obeying the laws which Oneness established for all minds, regardless of whether you are in the ego or not. These laws are permanent and unavoidable.
These laws are fully obvious and correctly obeyed when you have True Perception. These apply to God, Christ, and the Holy Spirit. They also apply to the ego even though it will deny it.
The ego will attempt to PRETEND that these laws do not apply or are not operating. (more on that later)
1) Whatever applies to you applies to the entire Sonship and all of existence equally, and vice versa. It is not possible for something to apply to you which does not apply to others the same. It is not possible for something to apply to them which does not apply to you. If something applies to you, it applies everywhere instantly. If something applies to another, it applies to you immediately. In other words, THERE ARE NO PRIVATE LAWS.
2) Ideas leave not their source, therefore you can only experience what is INSIDE your mind. You cannot experience attack from outside the mind or outside of your Self. Attack has to be manifest WITHIN your mind, put there by yourself. You can only be aware of the content of your mind, not what is separate from it.
3) Cause and effect are NEVER separated. Where there is a cause, there must be an effect. A mind cannot contain a cause without containing an effect, and vice versa. It is not possible for cause outside the mind to put effects inside the mind - the mind has to contain both cause and effect inside itself. You cannot perceive an attacker without inventing an attacker within yourself.
4) You cannot attack without being attacked. All attack is self attack. It is impossible to do something to a separate part of the Sonship without you experiencing absolutely all of the effects. They are you. You are one with them. You cannot judge, attack, hate, condemn, or find sinful, without it applying to you. It's either BOTH of you are sinful, or neither, but never one or the other. This is the meaning of SHARED INTERESTS.
5) You cannot perceive, access, be aware of, or affected by, anything outside of your mind. There IS no outside. You cannot perceive outside of yourself. Anything you perceive or are aware of must be happening WITHIN your own mind. Believing there is a separate will outside your mind will frighten you because of what it can do outside of the scope of your mind's reach, or in other words, it has power over you which you can do nothing to prevent. Such a belief will result in death.
6) Your mind cannot remain neutral and perceive something which is not neutral. There are no neutral thoughts. Your mind does not have the ability to perceive objectively that someone is being sinful, separate from your own sin. If they are seen as sinning, you are seen as sinning. You DO NOT have an ability to perceive neutrally or objectively while seeing sin. Therefore you cannot tell if your brother is sinful or not, because to see sin in them it MUST be in you, and you cannot see past your own sin, so are blind.
There may be some more ways we can talk about the way a mind of oneness operates, but this is enough for now.
Now, the mind is ALWAYS bound by these laws, no matter what, no matter if the ego is getting involved (false perception) or whether you are enlightened The presence of ego (an attempt to defy the law) DOES NOT stop the laws operating.
However, what the ego TRIES to do, is to DENY the law, and PRETEND that these laws are NOT permanently operating. It pretends it's possible to IGNORE these laws, and to operate in a different way, and not receive the consequences of the law. The ego sees itself as rewriting the laws and having power over the laws (law = God's Will).
The thing is, when the ego tries to pretend the laws don't apply, all kinds of shit happens. It will try to convince you there is a separation between cause and effect. It will try to convince you you can get away with murder, can see objectively that someone is sinful and not you, that what applies to you does not apply to others, that you have escaped consequences of sin and someone else is paying for it, and that you can use the body for attack without being attacked.
ACIM quote: "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."
Within the laws of God, this means that the ego tells you that you can see the sins of others "through" your body, without your body being affected. This is denial. It is not true. If you attempt to see your brother as sinful, IT MUST APPLY TO YOU ALSO. This automatically will condemn and attack YOU, and this WILL show up in your body image as symptoms or signs of attack. Another word for that is forms of sickness.
You literally cannot judge or accuse or condemn without being condemned, by yourself. What you are actually doing then, is you're trying to use the body as a weapon. Because there is a direct correlation between your belief in and projection of sin, and sickness showing up, you will make your body SICK, in an attempt to prove that your brother is sinful. This is the ONLY WAY you can attempt to prove it. By proving you can be attacked or hurt, you demonstrate that your brother is the sinner and not you. Or at least that's the ego's interpretation of it. In God's law, you are hurt BY YOUR OWN ATTACK.
People literally are walking around projecting sin and hate through their body, trying to get rid of sin onto someone else to escape the consequences of the law, but are nevertheless finding that it makes their body sick. They cannot escape the law, but they're pretending to. The effects of sickness in the body also then reflect the level confusion, that those outside of yourself are causing you to be hurt.
Trying to prove this is level confusion and will implement sickness. All sickness is a form of magic. Magic is the belief that a lower level can cause and higher level (e.g. body causes mind, others cause you, being a victim etc). This turns you into an EFFECT and your body will demonstrate those effects to correlate to the perceived external cause.
When someone gets to the point where their body is so sick that it seems to die, they are actually attempting to severely prove that they can suffer and die, that it is someone or something else *separate* that has caused it, and therefore the dying body is a weapon. It accuses everyone and everything of sin, being the cause of the death - anything other than yourself.
Death of the body is a fulfillment of a belief in sin, an attempt to kill the Son of God by binding him to form, and demonstrates a lack of forgiveness. A dying body is like a kamikaze weapon, attempting to infect and destroy everything and prove that God and His son are dead. God's death (the purpose of the dream of death) cannot be proven without YOU dying. Death is also completely "contained" as an effect upon YOURSELF, because ideas leave not their source and therefore, God is not affected by it.
This is of course an ego cover-up job, because NO-ONE CAN DIE WITHOUT THEIR OWN CONSENT. Meaning, your body cannot die unless you are believing that everyone else must be dead at some level. Death is symptomatic of huge level confusion, where the lower level (world of effects) has produced a "cause" upon the higher level (mind). The person believing this MUST show death in the body image to represent God's law that what applies to others applies to you. All sickness and death is an ACCUSATION that your brother has sinned against you.
This also therefore means that, if you stop accusing your brother of sin, your body CANNOT SHOW SICKNESS. No exceptions. Sickness can ONLY come about through mis-use of the law, where you attempted to perceive your brother as corrupt, sinful, guilty, wrong in some way. YOU will receive the effects of this belief. Your body will show it.
And this also means that if you stop believing in sin, your body MUST show and demonstrate a complete lack of symptoms of sickness. If there was sickness showing up previously due to prior judgement, IT MUST DISAPPEAR. No exceptions. What has no cause cannot remain. If you understand the Course's section on "sickness is a defense against the truth" you will see that we implement sickness only as a form of defense and denial of the truth, and as a form of level confusion. Once this denial and defenses is not needed, it will be dropped, and the sickness MUST DISAPPEAR as a result of having recognized the illusions you were implementing.
You need to also realize that attack can only happen INSIDE your mind. It's not possible to perceive or experience external attack. This means, if there is an "external person" who seems to attack, or is tempting you to believe in sin, the only way you can SEE that attack is if it is INSIDE the scope of your mind. That means, for you to SEE attack, your own mind has to be sectioned off and part of it has to become an attacker. This attacker is part of yourself, and is in ADDITION to the external attacker, projected onto them. Simultaneously, the part that is not seen as the attacker will be sectioned off and seen as a victim of attack. Your mind will now be attacking ITSELF.
Therefore realize, your mind implements both the belief in a CAUSE of sin, AND the effects of sin, simultaneously. This all happens inside yourself, even if it seems like the person attacking it outside of you. You cannot see them as the source of attack. You have to make YOURSELF the attacker. That means, as in the secret to salvation, that you are literally doing this to yourself. Your mind manifests/produces/visualizes and turns into FORM, both the attacker and the attacked, the cause and the effects. You will put effects of sickness into your body and hold it hostage with the part of you that is hallucinating an attacker.
Now here's the trick of healing. You have to recognize you are doing this to yourself. Other people or external causes have NOTHING to do with it. You are the one who invented the cause and the effects of your sickness. You believe in both of them, and your split mind has two identities. You must recognize that illusions of causes are not real causes, you are the one who, within your mind, is attacking yourself and pretending it has something to with others, and YOU put in place ALL of the symptoms/effects of that causality.
As Jesus tells us, "you made sickness and death and therefore can abolish both". Sickness has NO CAUSE other than your mind's decision to make it. Sickness has no reason to remain, other than your NEED to keep it (as a defense against truth).
When you do not need or choose to keep it, and recognize the illusion you made (that cause is unloving and sinful - which is really the belief that God in evil and has attacked you), the symptoms of sickness MUST DISAPPEAR. You DID make your sickness, and you DID make death, and you CAN abolish them. Not only that, because you are bound by the laws of God, you cannot FAIL to abolish them if you stop using your body for attack. Sickness simply must vanish to comply with the law.
There are no loopholes in the law. There are no exceptions. There are no other causes of sickness beyond yourself. Sickness has no mind, will or power of its own. No-one maintains it besides you. It can and must disappear when you return to True Perception. Illusions recognized must disappear. A guiltless mind cannot suffer, because a guiltless mind CANNOT MAINTAIN SICKNESS. Sickness has to disappear.
This is so black and white a law, that Jesus tells us, "a sick body is proof that the mind has not been healed." You literally CANNOT be sick if your mind is healed. If sickness is showing up, or remains, your mind IS NOT healed. You can be in denial of this, as most people are. You can believe that it's possible to be at peace and keep sickness. But you can't. The law confirms that sickness WILL NOT and CANNOT show up at all if the mind is sane and free. Similarly you cannot be at peace with death or dying, because to die is the ULTIMATE expression of a belief in sin.
The dead can be raised and all sickness can be healed, BECAUSE of the law. If this were not true, resurrection would be impossible. You cannot believe in death and make the body die and believe in resurrection. Using the body lovelessly will make it suffer and die. Believing only in eternal life will bring the body to health, since it is not being attacked and twisted and deformed by the mind's attitude. The body is just an image being projected, it can EASILY be changed by the healed mind.
Jesus tells us not to use sickness to attempt to demonstrate that our brother is a sinner. If our body is sick in any way, we ARE using it to prove he is a sinner. He asks us to demonstrate that WE CANNOT BE HURT, which proves that our brother is not sinful and cannot cause death. HIS innocence is proven when YOUR innocence is proven. This DOES play out on the visual, perceptible, illusory dream level of the world, because the world is a symbol in the mind. The body can become a symbol of holiness and innocence, used as a teaching device to prove to your brother that he has not sinned. HE WILL NOT BE ABLE TO ATTACK IT, because YOU will not put symptoms of sickness into it, and HE is not an evil cause of effects!
You must understand the law. The law applies to you. You cannot escape it. But you can be in denial and pretend it does not apply. And then you will suffer and die. Choose the equal innocence of the entire Sonship and Live.