“The Genius knows, that companion who controls our natal star, the god of man's nature attached to each human being's head, changeful in aspect, white and black.” With every person, family, and social group and place was connected a tutelary deity who from birth onwards controlled the destinies of the person or thing that lay under his sway, I dispensing either happiness or trouble. The word genius probably means “natal, connected by birth”, γεεθλιος, and to the Italian mind signified “the personality, the character, abstracted from the man and made into a god” (Roscher, Ausf. Lex. d. gr. u. röm. Myth., col. 1615, s.v.). These Genii were regarded as forming the proletariat or commons of the Italian gods (Seneca, Ep. 110), and the month of December was sacred to them (Ovid, Fasti III. 58). There are some traces in Italy of evil genii corresponding to these good spirits; the idea of this dualism is at bottom IE., though the rigid schematic application of it is perhaps due to later developments. In art the Genius was represented as a young man with a snake, or a snake alone. The former combination is really a kind of compound hieroglyph, in which the man's figure signifies youth or vitality and the snake stands for eternity, so that the combination means an eternal divine person, who was the guardian sprit or divine counterpart of a human being or place, quite distinct from the Manes or soul, which never could attain to divinity, and was liable to suffering after death.