An imagination so entirely materialistic may belong to a more primitive stage than any we can find among the Greeks. As soon as religion has reached the polytheistic stage the gods are regarded as travelling from image to image, just as they travel from temple to temple. Even in AEschylus' _Eumenides_ it will be remembered that when Orestes, by the advice of Apollo, clasps as a suppliant the ancient image of Athena at Athens, the goddess comes flying from far away in the Troad when she hears the sound of his calling. The exact relation of the goddess to the image is not, in all probability, very clearly realised; but, so far as one can trace it from the ritual procedure, what appears to be implied is that a suppliant will have a better chance of reaching the deity he addresses if he approaches one of the images preferred by that deity as the abode of his power; often there is one such image preferred to all others, as this early one of Athena at Athens. The deity was not, therefore, regarded as immanent in any image--at least, in classical times; the gods lived in Olympus, or possibly visited from time to time the people whom they favoured, or went to the great festivals that were held in their honour. But the various images of them, especially the most ancient ones, that were set up in their temples in the various cities of Greece were regarded as a means of communication between gods and men. The prayer of a worshipper addressing such an image will be transmitted to the deity whom he addresses, and the deity may even come in person to hear him, if special aid is required. A close parallel may be found even in modern days. I have known of a child, brought up in the Roman Catholic religion, who had a particular veneration or affection for a certain statue of the Virgin, and used often to address it or, as she said, converse with it. And she said she had an impression that, if only she could slip in unawares, she might see the Virgin Mary herself approaching or leaving the statue, whether to be transformed into it or merely to dwell in it for a time. On Greek vases we see the same notion expressed as in the _Eumenides_, when a god or goddess is represented as actually present beside the statue to which a sacrifice or prayer is being offered.