  Leibniz makes clear here his basic view of God's obligation to choose the best world possible, as well as his view that, if there were not a single best world, no world at all would have been brought into existence. At the same time, the argument for the infinity of possible worlds given here is rather comical: (granted, there must be one best world) for any world you can imagine (or find in the pyramid), there is one that is worse.  So much for Leibniz the optimist! 