Dylan Thomas says

Poetry is what in a poem makes you laugh, cry, prickle, be silent, makes your toenails twinkle, makes you want to do this or that or nothing, makes you know that you are alone and not alone in the unknown world, that your bliss and suffering is forever shared and forever all your own. All that matters about poetry is the enjoyment of it however tragic it may be all that matters is the eternal movement behind it – the great undercurrent of human grief, folly, pretension, exaltation and ignorance – however unlofty the intention of the poem….