There's really no reason to postulate a soul outside of the living brain. If one postulates a soul outside of the brain, it must have components, it cannot be an undifferentiated mass. For if it were undifferentiated, there would be no memory. Memory requires information storage which requires non-uniform components. The only advantage gained by thinking of the soul outside of the brain is to consider the soul to be "spooky" enough to account for our ability to have ideas and memories and feelings. But in the first place, such an offloading of the spookiness component of our selves fails to take account of the spookiness of our brains, which clearly involve electron jumping going on . . . and electrons can be in two places at once, can respond to a stimulus in an unpredictable fashion, can go from one place to another without occupying the space in between . . . . that's pretty spooky stuff right there! No, the brain as we know it is sufficiently "spooky" to be the sole repository of the soul.
The Ruarch is like someone moving parts as an avatar in gaining access to the material realm .
A person can sit behind a computer terminal and exhibit intelligence, yet the medium by which the person uses is a computer. A Ruarch uses a biomechanical body that God granted access to from conception and the interface is so real that you almost would think that you are the body/brain .
Say the connection between the Ruarch and the brain is severed momentarily and then returned, the person can discern the body is not him/her, but something separate to him/her.
We are not our body or brain is what I am postulating. The Ruarch is us in the purest form, regardless of understanding who we are through human experiences.
We exist within God's soul repository regardless of our experiences, emotions and thoughts .
Jesus hinted at this fact as follows
When Jesus saw this, he was indignant. He said to them, "Let the little children come to me, and do not hinder them, for the kingdom of God belongs to such as these.
Jesus was furious in better words and he shot down the disciples by saying you cannot prevent them from coming to me for the Kingdom of God belongs to them.
In other words Jesus is revealing that those Ruarchs are with him within his soul repository, so he is yelling at his disciples that they could not in the strongest tone prevent them from interacting with him.
If these children had no meaningful physiological interaction with Jesus as the disciples saw it, then Jesus is very very angry because they are preventing the ruarchs rather than the meaning of the physical interaction. Jesus was furious by screaming at his disciples along the lines of how dare you and who do you think you are in trying to deny me human interaction with the Ruarchs who are with me in Heaven, which points to the Ruarchs being remote to those children.
Whilst the disciples saw animated little bodies coming to him, Jesus saw beyond the reality of those little bodies, rather he saw those little Ruarchs remotely controlling those little bodies wanting to interact with him The Creator.
It is like Jesus wanted to see how those Ruarchs who are with him in Heaven are interacting with him through their little body interface and it facinated him and the disciples made him very angry because they wanted to deny him that experience.