More Riding:

"What is a poem? A poem is nothing. By persistence the poem can be made something; but then it is something, not a poem. Why is it nothing? Because it cannot be looked at, heard, touched or read (what can be read is prose). It is not an effect (common or uncommon) of experience; it is the result of an ability to create a vacuum in experience -- it is a vacuum and therefore nothing. It cannot be looked at, heard, touched or read because it is a vacuum. Since it is a vacuum it is nothing for which the poet can flatter himself or receive flattery. Since it is a vacuum it cannot be reproduced in an audience. A vacuum is unalterably and untransferably a vacuum -- the only thing that can happen to it is destruction. If it were possible to reproduce it in an audience the result would be the destruction of the audience."

-- note: a vacuum.