St. Augustine's Confession: The Mystery of Language

Was thinking of this passage and so reread it. Hardly a theory. But an interesting and probably "unintended" beginning (4th Cent. A.D.).

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Thus, little by little, I became conscious where I was; and to have a wish to express my wishes to those who could content them, and I could not; for the wishes were within me, and they without; nor could they by any sense of theirs enter within my spirit. So I flung about at random limbs and voice, making the few signs I could, and such as I could, like, though in truth very little like, what I wished. And when I was not presently obeyed (my wishes being hurtful or unintelligible), then I was indignant with my elders for not submitting to me, with those owing me no service, for not serving me; and avenged myself on them by tears. Such have I learnt infants to be from observing them; and that I was myself such, they, all unconscious, have shown me better than my nurses who knew it.

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Passing hence from infancy, I came to boyhood, or rather it came to me, displacing infancy. Nor did that depart,—(for whither went it?)—and yet it was no more. For I was no longer a speechless infant, but a speaking boy. This I remember; and have since observed how I learned to speak. It was not that my elders taught me words (as, soon after, other learning) in any set method; but I, longing by cries and broken accents and various motions of my limbs to express my thoughts, that so I might have my will, and yet unable to express all I willed, or to whom I willed, did myself, by the understanding which Thou, my God, gavest me, practise the sounds in my memory. When they named any thing, and as they spoke turned towards it, I saw and remembered that they called what they would point out by the name they uttered. And that they meant this thing and no other was plain from the motion of their body, the natural language, as it were, of all nations, expressed by the countenance, glances of the eye, gestures of the limbs, and tones of the voice, indicating the affections of the mind, as it pursues, possesses, rejects, or shuns. And thus by constantly hearing words, as they occurred in various sentences, I collected gradually for what they stood; and having broken in my mouth to these signs, I thereby gave utterance to my will. Thus I exchanged with those about me these current signs of our wills, and so launched deeper into the stormy intercourse of human life, yet depending on parental authority and the beck of elders.