in Thoreau’s Journal:
It is suddenly warm, and this amelioration of the weather is incomparably the most important fact in this vicinity. It is incredible what a revolution in our feelings and in the aspect of nature this warmer weather has produced. Yesterday the earth was simple to barrenness, and dead, bound out. Out of doors there was nothing but the wind and withered grass, and the cold though sparkling blue water, and you were driven in upon yourself.
Now, you would think there was a sudden awakening in the very crust of the earth, as if flowers were expanding and leaves putting forth; but not so….No, the change is mainly in us. We feel as if we had obtained a new lease of life.