In The Information Martin Amis gives us this: 'I know what his poetry will be about. What poetry is always about. The cruelty of the poet’s mistress.'
Very traditionally conceived But cruelty is not the correct word, really. Indifference comes closer to the mark; something mistaken for cruelty, occasionally, by those on the receiving end; but actually very different from it. Poetry is at root at attempt to puncture that indifference; to gain her attention.