When I opened my eyes I saw nothing but the pool of nocturnal sky, for I was lying on my back with out-stretched arms, face to face with that hatchery of stars. Only half awake, still unaware that those depths were sky, having no roof between those depths and me, no branches to screen them, no root to cling to, I was seized with vertigo and felt myself as if flung forth and plunging downward like a diver.