There is a door to sleep, which, when opened, expands the possibilities of perception geometrically and chromatically, all the way to the open horizon of dreami

There is a door to sleep, which, when opened, expands the possibilities of perception geometrically and chromatically, all the way to the open horizon of dreaming, unbound by the physical laws that tether us to mundane Waking life. Blake had his foot in that door. And the rest of him, for his foot was oriented backwards, just so that he could prise the door open from the opposite side for long enough to deposit a missive.