How does the author use imagery in the novel, Threatened?

Imagery:

The canopy was a katydid green, the jungle floor decked with clean circles and triangles of sunlight. It was almost as though the Inside was saying to me: Yes, I will take everything. You will wind up alone here. But it will be beautiful. Once you and I are all alone--and you have always known this would happen, haven't you?--there will still be beauty.