“Reason,” said Lao Tze some twenty five hundred years ago, “is of all things the emptiest. Yet its use is inexhaustible.” With equal justice, he might have said the same of language. But Lao Tze, whose profound metaphysical probing appeared to carry him beyond the reach of linguistic aid, was led to insist that “Those who know do not speak; those who speak do not know.” Yet the “Old Philosopher,” as he is known to the Chinese, might be said to admit, by the very implications of his insistence, that language can exercise the greatest influence on thought, if only, in his viewpoint, to nullify it. Today we acknowledge this influence by reversing the great metaphysician's statement, those without speech (i.e. language) in some form or other cannot know.