When describing nature, one must look at the speakers past experiences. The speaker talks about his past experiences of the "deep rivers," "lonely streams," and large "mountains." He rather carefully describes the process of his seeing as it unfolds, like the "landscape to a blind man's eye". He put into words that nature is not firm, rather it is free flowing and unique. It does not go by certain rules but is random and yet crystal-clear. The speaker then describes how his memory of these "beauteous forms" has worked upon him in his absence from them: when he was alone, or in crowded t…