The arts of SPEECH are rhetoric and poetry. Rhetoric is the art of carrying on a serious business of the Understanding as if it were a free play of the Imagination; poetry, the art of conducting a free play of the Imagination as if it were a serious business of the Understanding. The orator, then, promises a serious business, and in order to entertain his audience conducts it as if it were a mere play with Ideas. The poet merely promises an entertaining play with Ideas, and yet it has the same effect upon the Understanding as if he had only intended to carry on its business.
