“There is nothing outside you. That is what you must ultimately learn, for it is the realization that the Kingdom of Heaven is restored to you.” (A Course in Miracles, FIP ed., T-18.VI.1)
This passage puzzled me for a long time. I think it is a statement of a holographic universe: Each part contains the whole. So we are a part of the All, the One, that is God—and therefore there is nothing outside of us. We and our brother—all of our brothers—are One. Everything is alive with energy, the stuff of the universe.
We return to Heaven when we realize that we never really left at all. What leaving we did was all a mirage, an illusion, something that never happened in actuality at all. The separation never occurred! The separation could not have occurred because we are a part of God, and so we can be “separate” from him only in illusion, not reality at all.
These ruminations reflect the theology of A Course in Miracles. We will read further on, and then we will see the theology becoming all of one cloth. There is no strain. We will wake up to find ourselves at home in Heaven, the Oneness that we never really left at all.
MIRACLES EACH DAY 
Thank you for this. This may be evident to you already, but this is not a biblical teaching. Going to Genesis, God created man after He created everything else, essentially to oversee His creation. Hence God is separate from His creation. Adam and Eve, by rebelling in sin, separated themselves from God, who ejected them from Eden in consequence. God’s plan is to restore His people (the descendants of our first parents) to Eden(Heaven), but to do so, He had to send His Son, Jesus, to atone for their sin. When we face up to the atrocious nature of our own sins and follow Christ, we put our first foot in Heaven. Your thoughts?
In many ways, A Course in Miracles follows traditional teachings–but not in all, and your explanation is not the theology of A Course in Miracles. The teaching of love, though, is always first and foremost. Love, Celia