Writing freezes speech and in so doing gives birth to the grammarian, the logician, the rhetorician, the historian, the scientist—all those who must hold language before them so that they can see what it means, where it errs, and where it is leading. Plato knew all of this, which means that he knew that writing would bring about a perceptual revolution: a shift from the ear to the eye as an organ of language processing.
