If the religion of the ancient Indo-[=A]ryans was a form of Theism, it was a Theism of a very uncertain and unsettled character. It was a religious creed based on a vague belief in the sovereignty of unseen natural forces. Such a creed might fairly be called monotheism, henotheism, polytheism, or pantheism, according to the particular standpoint from which it is regarded. But it was not, in its earliest origin, idolatry. Its simple ritual was the natural outcome of each man's earnest effort to express devotional feelings in his own way. Unhappily it did not long retain its simplicity. The Br[=a]hmans soon took advantage of the growth of religious ideas among a people naturally pious and superstitious. They gradually cumbered the simplicity of worship with elaborate ceremonial. They persuaded the people that propitiatory offerings of all kinds were needed to secure the favour of the beings they worshipped, and that such sacrifices could not be performed without the repetition of prayers by a regularly ordained and trained priesthood. But this was not all. They developed and formulated a pantheistic philosophy, based on the physiolatry of the Veda, and overlaid it with subtle metaphysical and ontological speculations. They identified the Supreme Being with all the phenomena of Nature, and maintained that the Br[=a]hmans themselves were his principal human manifestation, the sole repositories and exponents of all religious and philosophical truth, the sole mediators between earth and heaven, the sole link between men and gods. This combination of ritualism and philosophy, which together constituted what is commonly called Br[=a]hmanism, gradually superseded the simple forms of Vedic religion. In process of time, however, the extravagance of Br[=a]hmanical ceremonial, and the tyranny of priestcraft, led to repeated reactions. Efforts after simplicity of worship and freedom of thought were made by various energetic religious leaders at various periods. More than one reformer arose, who attempted to deliver the people from the bondage of a complex ceremonial, and the intolerable incubus of an arrogant sacerdotalism.