A deity of an abstract character occurring in the oldest as well as the latest parts of the Rigveda is Brihaspati, "Lord of Prayer." Roth and other distinguished Vedic scholars regard him as a direct personification of devotion. In the opinion of the present writer, however, he is only an indirect deification of the sacrificial activity of Agni, a god with whom he has undoubtedly much in common. Thus the most prominent feature of his character is his priesthood. Like Agni, he has been drawn into and has obtained a firm footing in the Indra myth. Thus he is often described as driving out the cows after vanquishing the demon Vala. As the divine brahma priest, Brihaspati seems to have been the prototype of the god Brahma, chief of the later Hindu trinity. But the name Brihaspati itself survived in post-Vedic mythology as the designation of a sage, the teacher of the gods, and regent of the planet Jupiter. Another abstraction, and one of a very peculiar kind, is the goddess Aditi. Though not the subject of any separate hymn, she is often incidentally celebrated. She has two, and only two, prominent characteristics. She is, in the first place, the mother of the small group of gods called Adityas, of whom Varuna is the chief. Secondly, she has, like her son Varuna, the power of releasing from the bonds of physical suffering and moral guilt. With the latter trait her name, which means "unbinding," "freedom," is clearly connected. The unpersonified sense seems to survive in a few passages of the Rigveda. Thus a poet prays for the "secure and unlimited gift of aditi." The origin of the abstraction is probably to be explained as follows. The expression "sons of Aditi," which is several times applied to the Adityas, when first used in all likelihood meant "sons of liberation," to emphasise a salient trait of their character, according to a turn of language common in the Rigveda. The feminine word "liberation" (aditi) used in this connection would then have become personified by a process which has more than one parallel in Sanskrit. Thus Aditi, a goddess of Indian origin, is historically younger than some at least of her sons, who can be traced back to a pre-Indian age. Goddesses, as a whole, occupy a very subordinate position in Vedic belief. They play hardly any part as rulers of the world. The only one of any consequence is Ushas. The next in importance, Sarasvati, ranks only with the least prominent of the male gods. One of the few, besides Prithivi, to whom an entire hymn is addressed, is Ratri, Night. Like her sister Dawn, with whom she is often coupled, she is addressed as a daughter of the sky. She is conceived not as the dark, but as the bright starlit night. Thus, in contrasting the twin goddesses, a poet says, "One decks herself with stars, with sunlight the other." The following stanzas are from the hymn addressed to Night (x. 127):--