The creatures inhabiting the water, air, and earth were held in veneration by all races of antiquity. Realizing that visible bodies are only symbols of invisible forces, the ancients worshiped the Divine Power through the lower kingdoms of Nature, because those less evolved and more simply constituted creatures responded most readily to the creative impulses of the gods. The sages of old studied living things to a point of realization that God is most perfectly understood through a knowledge of His supreme handiwork--animate and inanimate Nature.Every existing creature manifests some aspect of the intelligence or power of the Eternal One, who can never be known save through a study and appreciation of His numbered but inconceivable parts. When a creature is chosen, therefore, to symbolize to the concrete human mind some concealed abstract principle it is because its characteristics demonstrate this invisible principle in visible action. Fishes, insects, animals, reptiles, and birds appear in the religious symbolism of nearly all nations, because the forms and habits of these creatures and the media in which they exist closely relate them to the various generative and germinative powers of Nature, which were considered as prima-facie evidence of divine omnipresence.