This type when once established was used for the creation of other deities, which were all, so to speak, cast in the same mould. As the intellect became more capable of abstraction and analysis, the personality and moral individuality of these gods gradually threw off its astral or physical characteristics, although it never lost all trace of their existence. It resulted that, both in Egypt and in Greece, there were deities who were mere entities, the simple embodiment of some power, some quality, or some virtue. It requires all the subtle _finesse_ of modern criticism to seek out and distinguish the obscure roots which attach these divinities to the naturalistic beliefs of earlier ages. Sometimes absolute certainty is not to be attained, but we may safely say that a race is polytheistic when we find these abstract deities among their gods, such deities as the Ptah, Amen, and Osiris of the Egyptians, and the Apollo and Athenè of the Greeks.[72] [72] Several of the bronzes which we reproduce may belong to the Ptolemaic epoch; but they are repetitions of types and attributes which had been fixed for many centuries by tradition. It is in this capacity chiefly that we reproduce them, as examples of those forms which seemed to the Egyptian imagination to offer the most satisfactory emblems of their gods. [Illustration: FIG. 34.--Amen or Ammon, from a bronze in the Louvre. Height 22·04 inches.] We may, then, define polytheism as the partition of the highest attributes of life between a limited number of agents. The imagination of man could not give these agents life without at the same time endowing them with essential natural characteristics and with the human form, but, nevertheless, it wished to regard them as stronger, more beautiful and less ephemeral than man. The system had said its last word and was complete, when it had succeeded in embodying in some divine personality each of those forces whose combined energy produces movement in the world or guarantees its duration. When religious evolution follows its normal course, the work of reflection goes on, and in course of time makes new discoveries. It refers, by efforts of conjecture, all phenomena to a certain number of causes, which it calls gods. It next perceives that these causes, or gods, are of unequal importance, and so it constitutes them into a hierarchy. Still later it begins to comprehend that many of these causes are but different names for one thing, that they form but one force, the application of a single law. Thus by reduction and simplification, by logic and analysis, is it carried on to recognize and proclaim the unity of all cause. And thus monotheism succeeds to polytheism. [Illustration: FIG. 35.--Ptah, from a bronze in the Louvre. Actual size.]