It was Plato who bridged the gap between poetry and philosophy; for, in his work, appearance, despised by his Eleatic and Sophist predecessors, became a reflected image of perfection. He set poets the task of writing philosophically, not only in the sense of giving instruction, but in the sense of striving, by the imitation of appearance, to arrive at its true essence and to show its insufficiency measured by the beauty of the Idea.