The imperfection of language is really due to the formation and correlation of words by accident, that is to say, by principles which are unknown to us. Hence we see why Plato, like ourselves unable to comprehend the whole of language, was constrained to “supplement the poor creature imitation by another poor creature convention.” But the poor creature convention in the end proves too much for all the rest: for we do not ask what is the origin of words or whether they are formed according to a correct analogy, but what is the usage of them; and we are compelled to admit with Hermogenes in Plato and with Horace that usage is the ruling principle, “quem penes arbitrium est, et jus et norma loquendi.” (8) There are two ways in which a language may attain permanence or fixity. First, it may have been embodied in poems or hymns or laws, which may be repeated for hundreds, perhaps for thousands of years with a religious accuracy, so that to the priests or rhapsodists of a nation the whole or the greater part of a language is literally preserved; secondly, it may be written down and in a written form distributed more or less widely among the whole nation. In either case the language which is familiarly spoken may have grown up wholly or in a great measure independently of them. (1) The first of these processes has been sometimes attended by the result that the sound of the words has been carefully preserved and that the meaning of them has either perished wholly, or is only doubtfully recovered by the efforts of modern philology. The verses have been repeated as a chant or part of a ritual, but they have had no relation to ordinary life or speech. (2) The invention of writing again is commonly attributed to a particular epoch, and we are apt to think that such an inestimable gift would have immediately been diffused over a whole country. But it may have taken a long time to perfect the art of writing, and another long period may have elapsed before it came into common use. Its influence on language has been increased ten, twenty or one hundred fold by the invention of printing.