"God, according to Leibniz, is the necessary being which constitutes the sufficient explanation of the totality of contingent things–why the universe is this way rather than any other. Thus far, God’s necessity is the only thing mentioned about such a being (there is not much religious or theological about this initially bare metaphysical concept). God as a being may be necessary, but if the contingent universe were simply a random or arbitrary act of God, then God would not constitute the required explanation of all things. In other words, God must not only be necessary, but also the source of the intelligibility of all things. It must be possible, therefore, to inquire into the reasons God had for authorizing or allowing this, rather than any other, universe to be the one that actually exists. And if God is to be the explanation of the intelligibility of the universe, then God must have access to that intelligibility, such that God could be said to know what it is that is being allowed to exist–that is, God must have the ability to grasp complete concepts, and to see at once the “whole demonstration” discussed above. God so far is therefore (i) a necessary being, (ii) the explanation of the universe, and (iii) the infinite intelligence."