In Part 3 of the Mont Blanc poem, Shelley talks about a  lot of things philosophically and naturally. Shelley is awe stricken by the things he sees while looking at amount Blanc. He becomes so deeply lost in his mind, he starts asking questions about gods knowing the truth about life and death. Then when he gets out of his trance, he is actually taking in everything around him and paints a beautiful picture of this big, beautiful, and terrible looking mountain. He has a lot of things going Through his mind while he observes and takes in everything around him. His thinking is very philosophical. Very much along the lines of if something happens and no one is there to see it, did it really happen? Lots of good thinking on Shelley's part.