Quote from Essays in the Art of Writing

Music and literature, the two temporal arts, contrive their pattern of sounds in time; or, in other words, of sounds and pauses.  Communication may be made in broken words, the business of life be carried on with substantives alone; but that is not what we call literature; and the true business of the literary artist is to plait or weave his meaning, involving it around itself; so that each sentence, by successive phrases, shall first come into a kind of knot, and then, after a moment of suspended meaning, solve and clear itself.  In every properly constructed sentence there should be observed this knot or hitch; so that (however delicately) we are led to foresee, to expect, and then to welcome the successive phrases.  The pleasure may be heightened by an element of surprise, as, very grossly, in the common figure of the antithesis, or, with much greater subtlety, where an antithesis is first suggested and then deftly evaded.

Robert Louis Stevenson