I ask myself this question frequently. I also ask, ‘How can I control and synchronise my physical consciousness and my spiritual energy/inner being whilst I sleep so that the transition is seamless and fully recalled when I awaken?’
I know that when you sleep you are in contact with (or better put) you become not only pure consciousness or spiritual energy, but you merge and interact with the energy of the Universe. This is the holder of all energy, of all things Universal.
In this energetic form, you can do so much during the sleep state which takes place in a different dimension. In this dimension, time has no meaning and you can literally visit other worlds.
The world of lucid and astral dreaming, as well as sleep paralysis, resides in this dimension.
The only thing is, that when you awaken, you are left with the whispers of what took place whilst you slept, in the form of fragments of memories or ‘so-called’ dreams. So, whilst we do contact pure consciousness whilst you sleep, we do not recall the experience when we wake up. The dimensional shift corrupts the recall of the memory.