[150] But, moreover, has not the whole question of semi-vowels, or vowels, or such elements as are completely mute, and the consideration of the sense in which each of these expressions is ordinarily used, and in short every notion connected with the voice, and the elements, and the parts of speech, been thoroughly worked out and brought to an accurate system by philosophy? And those thieves, after having as it were carried off a few drops from her torrent, and having sought to impregnate their own shallow souls with what they have stolen, are not ashamed to bring forth her resources as their own.