Poetry expands the literal meaning of words, evokes emotional or sensual responses in the reader. It is a way of expressing. It makes ordinary things uncommon and uncommon ordinary. It is the expression of the poet...the way he/she sees the world around them
You do not have to understand the poem, or the poet to enjoy it. In fact, I sincerely believe that taking poetry apart and delving for the meaning behind it ruins the whole experience.
For instance, you can look at the sun, and know that it is a super hot star. You learn exactly what the sun is in school. But, when you read :
"Busy old fool, unruly sun,
Why dost thou thus,
Through windows and through curtains, call on us?"
that same old, boring sun takes on a new meaning, a new face. Thats what poetry is all about.