in Thoreau’s Journal:

What subtle differences between one season and another! The warmest weather has, perchance, arrived and the longest days, but not the driest. When I remember gathering ripe blackberries on sandy fields or stones by the roadside, the very berries warmed by the sun, I am convinced of this. The seasons admit of infinite degrees in their revolutions.  Found one of the purple orchises in an open meadow.