Modern critics, who refuse to let a plain thing alone, have now started a theory that Cervantes's work is a vast piece of "symbolism." If so, Cervantes didn't know it himself and nobody thought of it for three hundred years. He meant it as a satire upon the silly romances of chivalry.
Stephen Leacock, Gerald Lynch (2002). “Leacock on Life”, p.49, University of Toronto Press