(M290) But we naturally ask, How did it come about that benefits so great and manifold were supposed to be attained by means so simple? In what way did people imagine that they could procure so many goods or avoid so many ills by the application of fire and smoke, of embers and ashes? In short, what theory underlay and prompted the practice of these customs? For that the institution of the festivals was the outcome of a definite train of reasoning may be taken for granted; the view that primitive man acted first and invented his reasons to suit his actions afterwards, is not borne out by what we know of his nearest living representatives, the savage and the peasant. Two different explanations of the fire-festivals have been given by modern enquirers. On the one hand it has been held that they are sun-charms or magical ceremonies intended, on the principle of imitative magic, to ensure a needful supply of sunshine for men, animals, and plants by kindling fires which mimic on earth the great source of light and heat in the sky. This was the view of Wilhelm Mannhardt.(798) It may be called the solar theory. On the other hand it has been maintained that the ceremonial fires have no necessary reference to the sun but are simply purificatory in intention, being designed to burn up and destroy all harmful influences, whether these are conceived in a personal form as witches, demons, and monsters, or in an impersonal form as a sort of pervading taint or corruption of the air. This is the view of Dr. Edward Westermarck(799) and apparently of Professor Eugen Mogk.(800) It may be called the purificatory theory. Obviously the two theories postulate two very different conceptions of the fire which plays the principal part in the rites. On the one view, the fire, like sunshine in our latitude, is a genial creative power which fosters the growth of plants and the development of all that makes for health and happiness; on the other view, the fire is a fierce destructive power which blasts and consumes all the noxious elements, whether spiritual or material, that menace the life of men, of animals, and of plants. According to the one theory the fire is a stimulant, according to the other it is a disinfectant; on the one view its virtue is positive, on the other it is negative.