  The second idea that Wolff took over from Leibniz is the idea that pleasure is itself the sensory perception of the perfection existing in an object. For Leibniz and all his followers, all of the properties of actually existing objects can be regarded as perfections, since they held that the actual world is the one selected to exist by God from among all possible worlds precisely because it is the most perfect; thus each object and all of its properties must in some way contribute to the maximal perfection of the actual world. But they also used the concept of perfection in a more ordinary way, in which some actual objects have specific perfections that others do not, and it is this sense of perfection that Leibniz employed when he stated that