A stock objection to the Incarnation is how Jesus could be one person if he has two rational natures. Now, the warrant for believing in the Incarnation doesn't depend on our ability to get to the bottom of how the two natures interrelate. However, here's an example of how different ranges of consciousness are consistent with unity of consciousness. When I dream, I'm aware of some things I'm unaware of when I'm awake, and when I'm awake I'm aware of some things I'm unaware of when I sleep.
Likewise, dreams are to some degree based on memory. Memories of things I experience when I'm awake. Dreams combine memory with imagination.
Conversely, I remember some of my dreams. When I'm awake, I can recall some of my dreams. So these two ranges of consciousness are interconnected.
Yet these are two very different mental states, with different mental content. But the same person can be the subject of both.