in Thoreau’s Journal:

Winter comes to make walking possible where there was no walking in the summer.  Not till winter can we take possession of the whole of our territory…The wonderful stillness of a winter day! The sources of sound are, as it were, frozen up…A transient acquaintance with any phenomenon is not sufficient to make it completely the subject of your muse. You must be so conversant with it as to remember it, and be reminded of it long afterward, while it lies remotely fair and elysian in the horizon, approachable only by the imagination…..

Never is there so much light in the air as in one of these bright winter afternoons, when all the earth is covered with new-fallen snow and there is not a cloud in the sky. The sky is much the darkest side, like the bluish lining of an egg-shell. There seems nothing left to make night out of. With this white earth beneath and that spot[less] skimmed-milk sky above him, man is but a black speck inclosed in a white egg-shell.