What is it like to be dead?
Modern materialist Man seems to have decided that to be dead is like being permanently in deep sleep, unaware of the self, unaware of anything.
The ancient world also seems to have regarded death as like being asleep; but like dreaming sleep. The Hades of the Greeks and Sheol of the Jews were states of being much like the world of dreams - the self was feeble, agency was feeble, the individual had little control and was merely swept-along by events.
In the ancient underworlds, as in dreams; memories slipped away almost as soon as formed, motivations likewise; understanding likewise. To be dead was thus to be delirious, or demented - to become a ghost - living in a perpetual present mostly dominated (like dreams) by perplexed incomprehension, confusion, angst - but presumably with interludes of pleasure and satisfaction.
We should note, therefore, that the ancient understanding of death as underworld, Hades, Sheol was Not that all men 'went to Hell'. The state of dead souls was one to be dreaded, as a modern Man would dread delirium or dementia - but it was Not a state of perpetual misery or torment.
Among Rudolf Steiner's ideas is that our self is spiritual and not located, and our body is like a mirror for the external self; the self sees-itself in the body. A similar idea from Rupert Sheldrake is that memory is like an electromagnetic field - a radio signal - and the brain is like a receiver - a radio - which intercepts this field, interprets and broadcasts it.
Common to such ideas is the notion that the human brain, the body, are not the origin of our-selves; but these solid things are necessary for our immaterial/ extensive selves to become centred, focused, autonomous, agent...
Back to Steiner... he suggested that during sleep the consciousness and the self left-behind the living body - so deep sleep without dreams is our experience of merely being alive in the body, rather like a plant; whereas dreaming sleep was when we became 'located' with the consciousness outside the body, in the spirit.
By such an account, sleep is closely analogous to death; because with death the physical body dies - but not human consciousness. The body dies, but the soul continues. If our awareness becomes cut-off from our bodies; we might expect that the remaining consciousness would be incomplete, and we would experience its life much as does the dreamer.
An immortal soul detached from its living body is in much the same situation as the dreaming consciousness.
So - until the work of Jesus Christ - Man's death was universally like sleep, but like dreaming sleep; and this state seemed to be the permanent fate of the dead.
But since Jesus; the universal fate of Men has been resurrection; and resurrection reunites consciousness with the body; but with a permanent immortal body.
This suggests that resurrection would be analogous to awakening from dreaming sleep; and with a similar sense of renewed agency, freedom, self-awareness, control. The consciousness returns to its living body - but not to the mortal body left-behind a few hours ago; but instead to to a new living body, the resurrected eternal body.
The choice of Heaven of Hell is a choice of where this resurrected Man will dwell. Indeed, Hell was not possible until resurrection had been instituted.
In sum; BC there was universal Sheol but no Hell; after Christ Sheol was abolished, there was universal resurrection and the possibility of Heaven - but the coming of Christ was also the coming of Hell.
With Sheol there was no possibility of Men choosing Hell, because the dead lacked free will, so the dead could not choose. But Christ's gift of life everlasting brought the post-mortal capacity to choose - to choose evil, as well as to choose Good.