Arthur Berriedale Keith, The Mythology of All Races/Volume 6 (1917)
“ In them are to be found many speculations of a more advanced kind than those of the Ṛgveda, yet at the same time the Atharvaveda contains a mass of popular religion which has been taken up and worked over by the same priestly classes to whose activity the other texts are due. It must, therefore, be recognized that the Ṛgveda gives only an imperfect impression of Indian mythology and that, in a sense, it is the work of an aristocracy; but at the same time it is impossible to regard the Atharvaveda as a direct complement of the Ṛgveda and as giving the popular side of the Ṛgvedic religion. ”
