Very useful, then, is the mode of symbolic interpretation for many purposes; and it is helpful to the right theology, and to piety, and to the display of intelligence, and the practice of brevity, and the exhibition of wisdom. “For the use of symbolical speech is characteristic of the wise man,” appositely remarks the grammarian Didymus, “and the explanation of what is signified by it.” And indeed the most elementary instruction of children embraces the interpretation of the four elements; for it is said that the Phrygians call water Bedu, as also Orpheus says: