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.