Language is an aspect of man, of nature, and of nations, the transfiguration of the world in thought, the meeting-point of the physical and mental sciences, and also the mirror in which they are reflected, present at every moment to the individual, and yet having a sort of eternal or universal nature. When we analyze our own mental processes, we find words everywhere in every degree of clearness and consistency, fading away in dreams and more like pictures, rapidly succeeding one another in our waking thoughts, attaining a greater distinctness and consecutiveness in speech, and a greater still in writing, taking the place of one another when we try to become emancipated from their influence. For in all processes of the mind which are conscious we are talking to ourselves; the attempt to think without words is a mere illusion,—they are always reappearing when we fix our thoughts. And speech is not a separate faculty, but the expression of all our faculties, to which all our other powers of expression, signs, looks, gestures, lend their aid, of which the instrument is not the tongue only, but more than half the human frame. The minds of men are sometimes carried on to think of their lives and of their actions as links in a chain of causes and effects going back to the beginning of time. A few have seemed to lose the sense of their own individuality in the universal cause or nature. In like manner we might think of the words which we daily use, as derived from the first speech of man, and of all the languages in the world, as the expressions or varieties of a single force or life of language of which the thoughts of men are the accident. Such a conception enables us to grasp the power and wonder of languages, and is very natural to the scientific philologist. For he, like the metaphysician, believes in the reality of that which absorbs his own mind. Nor do we deny the enormous influence which language has exercised over thought. Fixed words, like fixed ideas, have often governed the world. But in such representations we attribute to language too much the nature of a cause, and too little of an effect,—too much of an absolute, too little of a relative character,—too much of an ideal, too little of a matter-of-fact existence. Or again, we may frame a single abstract notion of language of which all existent languages may be supposed to be the perversion. But we must not conceive that this logical figment had ever a real existence, or is anything more than an effort of the mind to give unity to infinitely various phenomena. There is no abstract language “in rerum natura,” any more than there is an abstract tree, but only languages in various stages of growth, maturity, and decay. Nor do other logical distinctions or even grammatical exactly correspond to the facts of language; for they too are attempts to give unity and regularity to a subject which is partly irregular.