in Thoreau’s Journal:
I do not see that I can live tolerably without affection for Nature. If I feel no softening toward the rocks, what do they signify? I do not think much of that chemistry that can extract corn and potatoes out of a barren [soil], but rather of that chemistry that can extract thoughts and sentiments out of the life of a man on any soil.
It is in vain to write on the seasons unless you have the seasons in you.