in Thoreau’s Journal:
This is June–the month of grass & leaves. The deciduous trees are investing the evergreens & revealing how dark they are. Already the aspens are trembling again, and a new summer is offered me– I feel a little fluttered in my thoughts as if I might be too late. Each season is but an infinitesimal point. It no sooner comes than it is gone. It has no duration. It simply gives a tone & hue to my thought. Each annual phenomenon is a reminiscence & prompting. Our thoughts & sentiments answer to the revolutions of the seasons, as 2 cog-wheels fit into each other– We are conversant with only one point of contact at a time–from which we receive a prompting & impulse & instantly pass to a new season or point of contact. A year is made up of a certain series & number of sensations & thoughts–which have their language in nature. Now I am ice–now I am sorrel. Each experience reduces itself to a mood of the mind. I see a man grafting, for instance–What this imports chiefly is not apples to the owner–or bread to the grafter–but a mood or certain train of thought to my mind.