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.). *** 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. * Passing hence from infancy, I came to boyhood, ...