Our concern here is with the ancient Britons. It is unnecessary for us to glean evidence from Australia, South America, or Central Africa to ascertain the character of their early religious conceptions and practices. There is sufficient local evidence to show that a definite body of beliefs lay behind their worship of trees, rivers, lakes, wells, standing stones, and of the sun, moon, and stars. Our ancestors do not appear to have worshipped natural objects either because they were beautiful or impressive, but chiefly because they were supposed to contain influences which affected mankind either directly or indirectly. These influences were supposed to be under divine control, and to emanate, in the first place, from one deity or another, or from groups of deities. A god or goddess was worshipped whether his or her influence was good or bad. The deity who sent disease, for instance, was believed to be the controller of disease, and to him or her offerings were made so that a plague might cease. Thus in the Iliad offerings are made to the god Mouse-Apollo, who had caused an epidemic of disease.
Trees and wells were connected with the sky and the heavenly bodies. The deity who caused thunder and lightning had his habitation at times in the oak, the fir, the rowan, the hazel, or some other tree. He was the controller of the elements. There are references in Gaelic charms to "the King of the Elements".
The belief in an intimate connection between a well, a tree, and the sky appears to have been a product of a quaint but not unintelligent process of reasoning.[164] The early folk were thinkers, but their reasoning was confined within the limits of their knowledge, and biassed by preconceived ideas. To them water was the source of all life. It fell from the sky as rain, or bubbled up from the underworld to form a well from which a stream flowed. The well was the mother of the stream, and the stream was the mother of the lake. It was believed that the well-water was specially impregnated with the influences that sustained life. The tree that grew beside the well was nourished by it. If this tree was a rowan, its red berries were supposed to contain in concentrated form the animating influence of the deity; the berries cured diseases, and thus renewed youth, or protected those who used them as charms against evil influences. They were luck-berries. If the tree was a hazel, its nuts were similarly efficacious; if an oak, its acorns were regarded likewise as luck-bringers. The parasitic plant that grew on the tree was supposed to be stronger and more influential than the tree itself. This belief, which is so contrary to our way of thinking, is accounted for in an old Gaelic story in which a supernatural being says:
"O man that for Fergus of the feasts dost kindle fire ... never burn the King of the Woods. Monarch of Innisfail's forest the woodbine is, whom none may hold captive; no feeble sovereign's effort it is to hug all tough trees in his embrace."
The weakly parasite was thus regarded as being very powerful. That may be the reason why the mistletoe was reverenced, and why its milk-white berries were supposed to have curative and life-prolonging qualities.
Although the sacred parasite was not used for firewood, it served as a fire-producer. Two fire-sticks, one from the soft parasite and one from the hard wood of the tree to which it clung, were rubbed together until sparks issued forth and fell on dry leaves or dry grass. The sparks were blown until a flame sprang up. At this flame of holy fire the people kindled their brands, which they carried to their houses. The house fires were extinguished once a year and relit from the sacred flames. Fire was itself a deity, and the deity was "fed" with fuel. "Need fires" (new fires)[165] were kindled at festivals so that cattle and human beings might be charmed against injury. These festivals were held four times a year, and the "new-fire" custom lingers in those districts where New Year's Day, Midsummer, May Day, and Hallowe'en bon-fires are still being regularly kindled.
The fact that fire came from a tree induced the early people to believe that it was connected with lightning, and therefore with the sky god who thundered in the heavens. This god was supposed to wield a thunder-axe or thunder-hammer with which he smote the sky (believed to be solid) or the hills. With his axe or hammer he shaped the "world house".
In Scotland, a goddess, who is remembered as "the old wife",[166] was supposed to wield the hammer, or to ride across the sky on a cloud and throw down "fire-balls" that set the woods in flame. Here we find, probably as a result of culture mixing, a fusion of beliefs connected with the thunder god and the mother goddess.
Rain fell when the sky deity sent thunder and lightning. To early man, who took fire from a tree which was nourished by a well, fire and water seemed to be intimately connected.[167] The red berries on the sacred tree were supposed to contain fire, or the essence of fire. When he made rowan-berry wine, he regarded it as "fire water" or "the water of life". He drank it, and thus introduced into his blood fire which stimulated him. In his blood was "the vital spark". When he died the blood grew cold, because the "vital spark" had departed from it.
In the water fire lived in another form. Fish were found to be phosphorescent. The fish in the pool was at any rate regarded as a form of the deity who nourished life and was the origin of life. A specially sacred fish was the salmon. It was observed that this fish had red spots, and these were accounted for by the myth that the red berries or nuts from the holy tree dropped into the well and were swallowed by the salmon. The "chief" or "king" of the salmon was called "the salmon of wisdom". If one caught the "salmon of wisdom" and, when roasting it, tasted the first portion of juice that came from its body, one obtained a special instalment of concentrated wisdom, and became a seer, or magician, or Druid.