So great a feat is seldom accomplished, though the fault may well be as much on the reader's side as on the writer's. Habit and lethargy have dulled his palate. A novel has a story, a poem rhyme; but what art can the essayist use in these short lengths of prose to sting us wide awake and fix us in a trance which is not sleep but rather an intensification of life--a basking, with every faculty alert, in the sun of pleasure? He must know--that is the first essential--how to write. His learning may be as profound as Mark Pattison's, but in an essay it must be so fused by the magic of writing that not a fact juts out, not a dogma tears the surface of the texture.