This is not a simple poem. You'll need some serious concentration when you read it, and it's probably not going to come through clearly in just one read. It jumps from image to image, and has a lot of metaphors coming into play. They do come together in a coherent whole by the end of the poem, though. The view is worth the effort. So, lace up your good boots and get ready for a difficult, but exhilarating, hike.