Read it through once

I do not mean to deny that there are other literary merits — tenderness of sentiment, grandeur of thought, depth of passion — which a poem may possess. But these merits, unless they conduce to the production of Beauty, are not in themselves sufficient to constitute a poem of the highest order. That which is essential is the predominance of the aesthetic effect over every other consideration. Wherever the poet allows the didactic, the controversial, or the historical element to preponderate, there is a departure from the true poetic principle.