The Prelude

• "and troubled pleasure"

  oxymoron shows his arrogance to believe he was in control yet nature has more power over him

  he feels entitled to enjoy nature
• "of mountain-echoes my boat did move on"

  personification of mountains paints an image of the supernatural omnipresence of nature

  shows his naive lack of fear and doubt of their supernatural omnipotence
• "a trouble to my dreams"

  nature transcends mankind and it is not bound by time or restrictions of life

  shows the long term impact nature has on him
• "like a living thing, strode after me"

  simile shows how nature can behave like a human too

  verb "strode" implies a lot of strength and power demonstrating the power of the mountains and nature in general
• poems to compare:

  ozymandias - power of nature
• single stanza shows the overwhelming power of nature