  The logic of “the best” (optimum) is different from the logic of “the good.” Since goodness completes or perfects something, “the best” must be “a being which is fully complete (ens completissimum).” Now what is absolutely complete must possess all possible perfections. But existence is not just a perfection, one component among many making up such ontological completeness, it is the most fundamental feature of such completeness. Consequently, such an absolutely perfect being must exist. Bonaventure’s argument runs from the subject “God,” through the middle terms “the best” and “absolutely complete being,” to the predicate “exists.” In the shorter and even more memorable formulation, “If God is God, God is,” the premise If God is God is not an empty tautology (Seifert 1992, 216–217).  It means ‘if the entity to which the term God refers truly possesses the divine essence.’ And the conclusion means that such an entity must exist.