 It is not possible to investigate here Leibniz’s reasons for these apparently very strange views. Our present concern is with whether, and in what sense, Leibniz’s substances are subjects of change. One can say that, in so far as, at all times, they reflect the whole of reality, then they do not change. But in so far as they reflect some parts of that reality more vividly than others, depending on their position in space and time, they can be said to change.