I went to bed, but the presence of the eiderdown quilt, of the pillars, of the neat fireplace, by straining my attention to a pitch beyond that of Paris, prevented me from letting myself go upon my habitual train of fancies. And as it is this particular state of strained attention that enfolds our slumbers, acts upon them, modifies them, brings them into line with this or that series of past impressions, the images that filled my dreams that first night were borrowed from a memory entirely distinct from that on which I was in the habit of drawing. If I had been tempted while asleep to let myself be swept back upon my ordinary current of remembrance, the bed to which I was not accustomed, the comfortable attention which I was obliged to pay to the position of my various limbs when I turned over were sufficient to correct my error, to disentangle and to keep running the new thread of my dreams. It is the same with sleep as with our perception of the external world. It needs only a modification in our habits to make it poetic, it is enough that while undressing we should have dozed off unconsciously upon the bed, for the dimensions of our dreamworld to be altered and its beauty felt.