Whatever it is that we are observing can have a determinable momentum, and it can have a determinable position, but of these two properties, we must choose, for any given moment, which one we wish to bring into focus. This means, in reference to “moving particles” anyway, that we can never see them the way they “really are,” but only the way we choose to see them! As Heisenberg wrote: What we observe is not nature itself, but nature exposed to our method of questioning.11
