I suppose it is submerged memories that give to dreams their curious air of hyper-reality. But perhaps there is something else as well, something nebulous, gauze-like, through which everything one sees in a dream seems, paradoxically, much clearer. A pond becomes a lake, a breeze becomes a storm, a handful of dust is a desert, a grain of sulphur in the blood is a volcanic inferno. What manner of theatre is it, in which we are at once playwright, actor, stage manager, scene painter and audience?
W G Sebald. The Rings of Saturn.