This is one of John Keat's classics - Endymion. It is a beautiful piece, especially the 3rd and last stanza which you have left out.
Also, i'm not sure if you're aware but copying and pasting non-original work and passing it off as your own is considered plagiarism. Please use it as part of your post, perhaps using
quotes like this
And references to the original author.
Also, please feel free to write about your thoughts, analysis and/or other insights regarding the poem.