Jesus Christ told the Pharisees long ago that the Kingdom of GOD comes not by observation, but that it is within you (Luke 17:20-21). What this does NOT mean is that the Kingdom of GOD is literally inside of you. What this DOES mean is that the Kingdom of GOD starts inside of you. Flesh and bone cannot inherit the Kingdom of GOD, because His Kingdom is incompatible with sin. However, His Spirit, which if you are elect, was placed within us before the world even came to be. We were all predestined by His Power.
Since the physical body cannot accept the Kingdom of GOD, then it is reasonable to say that: Our spirit is the receiver of the Kingdom of GOD – as in, it is a gift of GOD – and that gift is Eternal Life through Jesus Christ (No one comes to GOD, but by Jesus Christ). When His Spirit works with our spirit, our soul experiences miraculous things. When the physical body fails to operate, our soul and spirit ascend to Heaven where GOD appoints the elect spirit/soul to a new body (physically immortal).
We are made in the image of GOD, and became a son of GOD when we were elected to be with Him eternally (John 1:12-13).