Because the predicate is already implicit in the subject of an analytic judgment, such a predicate does not give us any new knowledge about the subject.
Further, one might suppose that the substance which according to them underlies as matter is too mathematical, and is a predicate and differentia of the substance, ie.
And if we attend faithfully, surrendering to the unfolding logic of predication, not only the completing, but the excitement of its having been done, will be ours by proxy.
The specific kind of metaphorical predication, or endowment of transfigurative properties, causes modifications of categories, of ontological-real categories: those that are prior to any sort of understanding.
For this reason substances and persons are for Leibniz equivalent to subjects of an analytic proposition; they really contain, he said, all their predicates.
The first fact about the universe is like any other fact; it does not contain, so far as the power of human analysis is capable of discovering, any clearly necessary predicate.