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He wrote this in his book, Principia Mathematica: The true God is a living, intelligent, and powerful being. His duration reaches from eternity to eternity; His presence from infinity to infinity ... He governs all things and knows all things that are or can be done. He is not eternity and infinity, but eternal and infinite; He is not duration or space, but He endures and is present. He endures forever and is everywhere present; and, by existing always and everywhere, He constitutes duration and space. This most beautiful system of the sun, planets, and comets could only proceed from the counsel and dominion of an intelligent and powerful Being ... He is omnipresent, not virtually only, but also substantially; for virtue cannot subsist without substance. In Him are all things contained and moved.”