Through what struggles the harmonious use of the organs of speech was acquired; to what extent the conditions of human life were different; how far the genius of individuals may have contributed to the discovery of this as of the other arts, we cannot say: Only we seem to see that language is as much the creation of the ear as of the tongue, and the expression of a movement stirring the hearts not of one man only but of many, 'as the trees of the wood are stirred by the wind.'