One of the greatest realization one can have is realization of yourself as spirit, as Consciousness versus a lifeless body. Some, like Robert Adams, Nisargadatta, and Ramana after a while even want to forget their corporeal cloak, and call the body illusion. But they do not say that after they are dead.
Spirit and matter are identical. No body,no Consciousness.In any even in their later days as they are dying of cancer,their bodies are of utmost concern because of pain and limitations on movement.
No matter how they talk before their final days, in their final days they have utmost concern about their bodies, and with the body's death, they are no more. That individuality is gone forever, for that individual's Consciousness died even before the body was dead.
If their is anything that "survives" death, it had to be their before life, because that which is born always dies. The "soul" if it survives, must be there even before birth.
Yet, is that our experience? Do we remember being 6 months old, ten months old, being an individual? No.
Do we even remember being a soul, a person, in deep sleep?
So really, our individual existence is a once and for all experience.
However, there is that mystical connection of Consciousness and matter, or embodied spirit that lies at the core of all of us. Life and awareness arising out of embodiment. This is where God and matter meet to create individual life forms, and it is out of this matrix were arise, and to this we return. Nisargadatta called it Parabrahman, that principle that knows both existence and non-existence.