Book excerpt: This eBook edition of "Isis Unveiled" has been formatted to the highest digital standards and adjusted for readability on all devices. Isis Unveiled is a two-volume classic of esoteric philosophy which discusses occult science and the hidden and unknown forces of nature as well as the similarity of Christian scripture to Eastern religions such as Buddhism, Hinduism, the Vedas, and Zoroastrianism. The book follows the Renaissance notion of prisca theologia, in that all these religions purportedly descend from a common source; the ancient "Wisdom-Religion".