The last, a famous hymn, Mueller entitles "To the Unknown God." It may have been intended, as has been suggested, for a theological puzzle,[29] but its language evinces that in whatever form it is couched--each verse ends with the refrain, 'To what god shall we offer sacrifice ?' till the last verse answers the question, saying, 'the Lord of beings'-- it is meant to raise the question of a supreme deity and leave it unanswered in terms of a nature-religion, though the germ is at bottom fire: "In the beginning arose the Golden Germ; as soon as born he became the Lord of All.

He established earth and heaven--to what god shall we offer sacrifice?
He who gives breath, strength, whose command the shining gods obey; whose shadow is life and death....

When the great waters went everywhere holding the germ and generating light, then arose from them the one spirit (breath) of the gods....

May he not hurt us, he the begetter of earth, the holy one who begot heaven ...

Lord of beings, thou alone embracest all things ..." In this closing period of the Rig Veda--a period which in many ways, the sudden completeness of caste, the recognition of several Vedas, etc., is much farther removed from the beginning of the work than it is from the period of Brahmanic speculation--philosophy is hard at work upon the problems of the origin of gods and of being.