When you begin to fall asleep, your body stiffens and you forget who you are. The room around you changes strangely almost imperceptibly. A space-within-space opens above you where your eyes would be if you were standing up. There are things there with many voices; that place is home, and you know these things far better than you know anything in 'real life.' In time (and it may seem like a long time, though only minutes pass in 'real life') you will no longer have any sense of your self. Once you've found them, and come this far, it's too late.