  God's will is as immutable and eternal as His knowledge; yet it is not constrained by the essential relation that binds ideas together. God has always known the individual entities that he will actualize in the various species, as well as those that he will not, yet His decision in this regard is absolutely free and does not correspond to any essential order. The concrete, “practical” actualization of individual entities is not the same as the formal, ontological possibility of essences. God constructs the essential framework of the world through ideas and speculative knowledge, while it is through their practical extension that He freely brings into being some of the creatures eternally constituted as possible. Yet there is no correspondence, strictly speaking, between one order and another.