Having drawn attention to the way in which experience is initially polarized into subject and object we can now pass on to the examination of another distinction which is discoverable within each. This is the difference between structure and process. On both sides we have a flux of changes but through them all a certain continuity and order, a structure that is relatively permanent amid the temporary and sometimes fleeting processes. This distinction is to be recognized on both sides, but for the present we shall confine ourselves to its manifestation on the side of the object. The fluctuating character of objective appearances is, of course, in part due to the instability of the subjective activity which observes them. But they also change of themselves, independently of the subject. Some features of the object are, of course, much more enduring than others. The houses in the street and the hills we visit in the summer seem to outlast many observations—and many observers. Still we know they change. They all manifest the transitional, ephemeral character of process.