What impresses me most now is just how seriously medicine is taking all this. At the least meditation establishes intent to be healthy and that may well inspire your physical light body to act. Today science is operating on the consensus that such a spiritual body simply does not exist or alternately as i did that if it existed it existed as a minor component of our physical existence and should be largely dismissed.
Bad mistake! The light body has an information density millions of times greater than any similar measure for our physical bodies. It is sufficient even to operate multiple aspects of ourselves on earth at the same time. This novel capability works particularly for lesser lifeforms and allows a sort of parallel cognitive presence comparable and reactive to human consciousness. Thus we have the world of Deva which is the likes of local spirits of all kinds and ultimately includes ourselves.
It apparently takes serious effort to sense the world of Deva. However once done, you become attuned and can sort out good and bad safely. I suspect most are now dabbling without been properly trained by their Guardian Angel. I have seen enough to know to be wary.
It is enough to know that humanity has its own realm and i do not think any spirit remains locked in the past for too long. How that holds for those subsumed with vice i am not sure as what has been described is a trap of like minded spirits unable to understand themselves.
The path of meditation leads to improved self awareness and an ability to advance spiritually. That is surely good enough for most of us. If you are ready for more, the spirit world will then open that door. Trust it and learn patience but also remain critical to not be misled..