So do you not find it strange that our awareness, our focus, seems to disappear while sleeping. Isn’t it odd that every night we put our head on the pillow, we cease to be aware, and in the morning we awake and our awareness of being ourselves is restored? I find it rather miraculous, and mysterious.
Last night I was wakened by the sound of the wind chimes that hang here, and I remember that I was deep asleep, and as I was hearing the chimes I was rising up from the depths. I was coming from a dreamless sleep, a deep dark nothingness that was even so very comfortable. Yet I must have been somewhat aware, because the sound of the chimes penetrated into wherever I was.
Hence sleep is not nothingness, even though it does feel like that at times. Osho once said that sleep and meditation were closely related... I can see the point in that, because in deep meditation too one loses contact with the mind, much like deep sleep.