The Ragas are derived from five different sources: the mathematical law of variety, the inspiration of the mystics, the imagination of the musicians, the natural lays peculiar to the people residing in different parts of the land, and the idealization of the poets. These made a world of Ragas, calling one Rag - the male, another Ragini - the female, and others Putras - sons, and Bharyas - daughters-in-law.