The waking have one world in common; sleepers have each a private world of his own.

The waking have one common world, but the sleeping turn aside each into a world of his own.

The awake share a common world, but the asleep turn aside into private worlds.

All men, while they are awake, are in one common world; but each of them, when he is asleep, is in a world of his own.

The waking have one world
in common. Sleepers
meanwhile turn aside, each
into a darkness of his own.

When we are asleep in this world, we are awake in another.

two people can sleep in the same bed and still be alone when they close their eyes

‎Our life is twofold; Sleep hath its own world, a boundary between the things misnamed Death and existence. Sleep hath its own world, and a wide realm of wild reality; and dreams in their development have breath, and tears, and tortures, and the touch of joy. They leave a weight upon our waking thoughts, they take a weight off our waking toils. They do divide our being; they become a portion of ourselves as of our time, and look like heralds of eternity. They pass like spirits of the past — they speak like sibyls of the future; they have power — the tyranny of pleasure and of pain. They make us what we were not — what they will, and shake us with the vision that’s gone by, the dread of vanished shadows — Are they so? Is not the past all shadow? — What are they? Creations of the mind? — The mind can make substances, and people planets of their own, with beings brighter than have been, and give a breath to forms which can outlive all flesh. I would recall a vision which I dreamed, perchance in sleep — for in itself a thought, a slumbering thought, is capable of years, and curdles a long life into one hour.

I live in my dreams — that's what you sense. Other people live in dreams, but not in their own. That's the difference.

Some people talk in their sleep. Lecturers talk while other people sleep

Sleeping is a way of dying or at least of dying to reality, better still it is the death of reality, but reality dies in love as in dreams. The life of man is entirely occupied by the bloody osmosis of dreams and love.

They will tell you, you can't sleep alone in strange place.
Then they'll tell you, you can't sleep with somebody else.
Ah, but sooner or later you sleep in your own space.
Either way, it's okay, you wake with yourself.

Sleep is for the inhabitants of Planets only. In another time, Man will sleep and wake continually at once. The greater part of our Body, of our Humanity itself, yet sleeps a deep sleep.

On the other side of the aisle are evolutionary psychologists and cross-cultural sociologists, who point out that the American habit of sleeping separately is a global and historical singularity. Almost all the world’s parents sleep with their children, and until the last sliver of human history, separate sleep was surpassingly rare. The burden of proof thus falls upon our culture to justify its anomalous nighttime practices.