More poetry definitions

From reader Jack, more on poetry:

"Here is a quote for your son to ponder,
'Seldom seen on restroom wall
are words that do not rhyme at all.'

"or perhaps this, from 'The Journal of My Other Self' (R.M.Rilke)
'he was a poet and hated the approximate'"

Thanks, Jack.

And here's a scholarly, and most unpoetic, attempt to define poetry from About.com:
"Poetry is an imaginative awareness of experience expressed through meaning, sound, and rhythmic language choices so as to evoke an emotional response. Poetry has been known to employ meter and rhyme, but this is by no means necessary. Poetry is an ancient form that has gone through numerous and drastic reinvention over time. The very nature of poetry as an authentic and individual mode of expression makes it nearly impossible to define."

Snore. All you need are the last three words: "impossible to define."