As far as the human mind is developed, the area of ​​the miraculous and supernatural is wider and immense for it; therefore, all the incomprehensible and striking phenomena of him belong to him to the action of a higher, mysterious power. This is the origin of the world outlook of primitive peoples, in whom, over the course of time, invisible abstract forces were recognized as deities governing the fate of people, at which there usually arose the influence of deities on good and evil, clean and unclean. Deities have their servants angels and gods. Evil spirits and their incarnations in the image of bots, according to the primitive peoples and uncultured popular masses, have great influence on human life; unhappiness, death and illness depend on them. Sumtsov) says that diseases have long been among different peoples in the form of demonic beings. The spirits of darkness are doctors of health and life; they penetrate into the body of a person and serve as a source of illnesses, they darken the mind and torment the body. Already in the brick books of the ancient Chaldeans, there are conspiracies against diseases, like demonic beings. Among the Iranians, magic spells and cleansing from illnesses were widespread, like unclean demonic creatures. Among the Greeks and Romans, illnesses also had a demonic meaning, In the ancient Scandinavians, internal illnesses were attributed to the action of evil spirits and treated them with conspiracies and sympathetic means. In England in the X and XI centuries and later internal illnesses were considered directly caused by evil spirits, elves, demons, spells of sorcerers or the pernicious influence of the evil eye. The Slavs, in particular the Russians, share the demonic origin of illnesses with all other peoples.