Accordingly, when we say the universe has One God, which means one absolute Ruler and Controller, it is inconceivable that there is any other absolute power. For if there were, there would no longer be one Ruler but as many as the number of independent wills that had been brought into being, and then none of them could truly be called “Ruler”. In that case it would be impossible to relate everything to one root – as we must – except in the past.
We could say that at first there was one root, but now we could no longer relate everything to a single root, because we would be saying that a being exists who has the power to limit the initial Ruler. And if you object that if the initial Ruler wills it to be so, this is not called limiting the initial Ruler, the answer to this objection will be given in Opening 2.