Full Idea
It can be said that whatever we truthfully distinguish or compare is also distinguished or made alike by nature, although nature has distinctions and comparisons which are unknown to us and which may be better than ours.
Gist of Idea
Our true divisions of nature match reality, but are probably incomplete
Source
Gottfried Leibniz (New Essays on Human Understanding [1704], 3.06)
Book Reference
Leibniz,Gottfried: 'New Essays on Human Understanding', ed/tr. Remnant/Bennett [CUP 1996], p.309
A Reaction
This seems to me to be correct, though it is more like the credo of the sensible realist than it is like any sort of argument.