Your first Keats Poem! It was written in October 1816. Read the Text as it is, then follow the link to an annotated version:

On First Looking into Chapman's Homer
1 Much have I travelled in the realms of gold,
  And many goodly states and kingdoms seen;
  Round many western Islands have I been
Which bards in fealty to Apollo hold.
5 Oft of one wide expanse had I been told
  That deep-browed Homer ruled as his demesne;
  Yet never did I breathe its pure serene
Till I heard Chapman speak out loud and bold:
Then felt I like some watcher of the skies
10   When a new planet swims into his ken;
Or like stout Cortez when with eagle eyes
  He stared at the Pacific - and all his men
Looked at each other with a wild surmise
  Silent, upon a peak in Darien.

Annotated Version  No Peeking!