Imagine that you live in a reality where you are always included in everything. Anything that happens, happens to others, and it happens to you. Anything that you give, you give to others, but you also receive. Anything that transpires happens to all at once.
Anything that is expressed by you is received by everyone, and received by yourself. Like, you literally ARE the whole of everything. The whole is your self. The entire realm of reality, the kingdom of God, is your self. So anything that takes place, you know about it, you feel it, you experience it along with everyone.
Everyone co-creates together. You are never excluded in any way. That's the fundamental fact of how reality actually IS. This is the law of God. This is the golden rule. What you do to another you do to yourself. You are one with everyone. You are the whole environment, not just a figure in the environment. You are heaven. The kingdom is your self. The sonship is your soul. All your brothers are part of you. No-one escapes anything ever. Everyone is always included, shares everything, has everything.
This is how reality really is. This is what produces shared interests. How would you act, think, feel, behave, if you knew that this was the fundamental law of existence? That anything you do even slightly you will do to yourself as well? This provides the incentive that you should only love, otherwise you will deprive yourself of love. You should only heal, otherwise you will make yourself sick. You should only include, otherwise you will become alone.
This is what ACIM is teaching you to remember and to attune to. Knowing your neighbor and brother as yourself. Realizing that if you do something you do it to yourself. The secret of salvation. Whatever you give you receive. Anything you see as being in your own interest is to be seen as being in the interests of everyone. Miracles are given to you in order that the be given through you to others and thus shared by everyone. Miracles are a universal blessing from God to the entire sonship all at once.
We need to re-learn this because we have forgotten how to live as shared entities, with shared identities. We think we are separated off by bodies, exclusive, omitted, rejected, lost, alone, not qualifying, left out. As though others can do something that doesn't include themselves, and you can do things in return that don't include yourself. As if you can get away with murder. As if you can attack without being attacked, or project guilt and escape from it without it still belonging to you. This is all the ego's realm of lies and deceit, denial and projection, dissociation and separation.
You have to learn to remember again that you are not just some separate figure in the world, separated off from others, separate from effects. You are the entire environment. You are the whole. You are the sonship. You are the kingdom of God. You are included in everything at all times. Every thought affects everyone. Every act impacts the entire universe. You are the one, shared with all. Everything belongs to you and to everyone else simultaneously. Everyone has full access to everything at all times. There are no limits anywhere.
"The secret of salvation is that you are doing this to yourself."
"I am not alone in experiencing the effects of my thinking."
"When I heal I am not healed alone."
"Nothing is for you alone."
"Atonement is a lesson in sharing."
"I will not judge lest I be judged."
"Giving and receiving are one."
"Miracles are a universal blessing from God through me to all my brothers."
"One brother is all brothers. Every mind contains all minds. Such is the truth."
"You had everything when you were created, just as everyone did."
"The sonship is your soul."
"We are the kingdom, WE, the sons of God."
"The Kingdom of heaven includes all his children and their creations."
"I and my father are one."