What is the theme of "a windstorm in the forests"?

“A wind-storm in the forests” is more essay than story, but perhaps it is best described as a mood-piece: it uses a lot of musical imagery, not to mention sea imagery, religious imagery, and any other imagery that suits his purpose. And that purpose? To convey the grandeur and timelessness of the forests he loves and wants to protect. The story commences with a discussion of trees in the Sierra and how they variously respond to the wind, and then moves onto a description of a particular wind-storm during which he climbed a 100 ft Douglas Spruce to experience the storm first hand:..