Closely allied to these poetical riddles is the philosophical poetry contained in the six or seven cosmogonic hymns of the Rigveda. The question of the origin of the world here treated is of course largely mixed with mythological and theological notions. Though betraying much confusion of ideas, these early speculations are of great interest as the sources from which flow various streams of later thought. Most of these hymns handle the subject of the origin of the world in a theological, and only one in a purely philosophical spirit. In the view of the older Rishis, the gods in general, or various individual deities, "generated" the world. This view conflicts with the frequently expressed notion that heaven and earth are the parents of the gods. The poets thus involve themselves in the paradox that the children produce their own parents. Indra, for instance, is described in so many words as having begotten his father and mother from his own body (x. 54, 3). This conceit evidently pleased the fancy of a priesthood becoming more and more addicted to far-fetched speculations; for in the cosmogonic hymns we find reciprocal generation more than once introduced in the stages of creation. Thus Daksha is said to have sprung from Aditi, and Aditi from Daksha (x. 72, 4). The evolution of religious thought in the Rigveda led to the conception of a creator distinct from any of the chief deities and superior to all the gods. He appears under the various names of Purusha, Viçvakarman, Hiranyagarbha, or Prajapati in the cosmogonic hymns. Whereas creation, according to the earlier view, is regularly referred to as an act of natural generation with some form of the verb jan, "to beget," these cosmogonic poems speak of it as the manufacture or evolution from some original material. In one of them (x. 90), the well-known Hymn of Man (purusha-sukta), the gods are still the agents, but the material out of which the world is made consists of the body of a primeval giant, Purusha (man), who being thousand-headed and thousand-footed, extends even beyond the earth, as he covers it. The fundamental idea of the world being created from the body of a giant is, indeed, very ancient, being met with in several primitive mythologies. But the manner in which the idea is here worked out is sufficiently late. Quite in the spirit of the Brahmanas, where Vishnu is identified with the sacrifice, the act of creation is treated as a sacrificial rite, the original man being conceived as a victim, the parts of which when cut up become portions of the universe. His head, we are told, became the sky, his navel the air, his feet the earth, while from his mind sprang the moon, from his eye the sun, from his breath the wind. "Thus they (the gods) fashioned the worlds." Another sign of the lateness of the hymn is its pantheistic colouring; for it is here said that "Purusha is all this world, what has been and shall be," and "one-fourth of him is all creatures, and three-fourths are the