This being premised, we are going to establish a series of conclusions, concerning movement and its affections, parallel to that which we have developed in the preceding pages respecting power and its exertions. The reader will see that the chain of our analogies must here end; for, since movement is not action, it affects nothing new, and produces no extrinsic terms, but only entails changes of local relations. On the other hand, the affections of local movement are not of a transient, but of an immanent, character, and thus they give rise to no new entity, but are themselves identified with the movement of which they are the modes. Our conclusions are the following:
1st. There is in all local movement something permanent—that is, a general determination of a lasting character, which has no need of being individuated in one manner more than in another.
2d. This constant determination is an objective reality.
3d. This same determination is nothing accidentally superadded to local movement.
4th. This determination is the virtuality of the momentum of movement, or the act of evolving extension in a definite direction.
5th. This determination is not intrinsically modified by any accidental modification of local movement.
6th. The affections of local movement are intrinsic and intransitive modes, which identify themselves with the movement which they modify.
The first of these conclusions is briefly proved thus: whatever is a subject of real modifications has something permanent. Local movement is a subject of real modifications. Therefore, local movement involves something permanent.
The second conclusion is self-evident.
The third conclusion, too, is evident. For whatever is accidentally superadded to a thing can be accidentally taken away, and therefore cannot belong to the thing permanently and invariably. Hence the constant and fixed determination in question cannot be an accident of local movement.