Speaking of prose there is a lovely story that a lady once asked Brendan Behan to define the difference between poetry and prose in his work.
BB replied thus:
There was a young man called McFee
Who worked for Accles and Pollocks
He went for a walk by the sea
And the water came up to his knees.
"That Missus" says BB "Is prose, but another few inches of water and it would have been poetry"