in Thoreau’s Journal:

The winter morning is the time to see in perfection the woods and shrubs wearing their snowy and frosty dress. Even he who visits them half an hour after sunrise will have lost some of their most delicate and fleeting beauties. The trees wear their morning burden but coarsely after midday, and it no longer expresses the character of the tree…the stems and branches of the trees look black by contrast.  You wander zigzag through the aisles of the woods where stillness and twilight reign. I do not know but a pine woods is as substantial and as memorable a fact as a friend. I am more sure to come away from it cheered than from this who are nearest to being my friends.