There is, however, an essential difference between the two theories. Theism and Deism have this in common, that both assume a spiritual power, a divine being, as the cause and source of everything that exists. They differ in this: to Theism this power is immanent in us and the things round us; Deism considers this power as separate from the things. Revelation or prophecy is altogether denied by the Deists, whilst the Theists would accept it after their own fashion and rationalise it. All these various systems of religion have this in common, that they attempt to remove from religion everything that cannot be comprehended by human reason. But all attempts to substitute human reason for Divine authority have failed. A limit has been set to human reason, and that cannot be overcome. In every system of religion—the natural and the rational included—there is a mystic element, which may be enveloped in a mist of phrases, but remains unexplained. Whether we call the Creator and Ruler of the universe God, Deus, or Theos, His relation to the universe, and to man in particular, cannot be determined by the laws which determine the natural phenomena in the universe, created by His Will. What is our conception of the Deity? The fundamental idea, from which all our notions concerning God are derived, and which we have in common with all other believers in God, is that He is the First Cause, the Creator of the universe. This idea expressed in the term ‏הבורא יתברך שמו‎ forms the basis of our creed. It is the Creator that is described in it. Seven of the articles begin, “I believe with a perfect faith that the Creator, blessed be His name,” &c.