But why should we not regard the stability of intelligible things also as a negation of movement? Because stability is not the privation of movement; it does not begin to exist when movement ceases, and it does not hinder it from simultaneous existence with it. In intelligible being, stability does not imply the cessation of movement of that whose nature it is to move.[430] On the contrary, so far as intelligible being is contained in (or, expressed by) stability, it is stable; so far as it moves, it will ever move; it is therefore stable by stability, and movable by movement. The body, however, is no doubt moved by movement, but it rests only in the absence of movement, when it is deprived of the movement that it ought to have. Besides, what would stability be supposed to imply (if it were supposed to exist in sense-objects)? When somebody passes from sickness to health, he enters on convalescence. What kind of stillness shall we oppose to convalescence? Shall we oppose to it that condition from which that man had just issued? That state was sickness, and not stability. Shall we oppose to it the state in which that man has just entered? That state is health, which is not identical with stability. To say that sickness and health are each of them a sort of stability, is to consider sickness and health as species of stability, which is absurd. Further, if it were said that stability is an accident of health, it would result that before stability health would not be health. As to such arguments, let each reason according to his fancy! CONCLUSION OF THE STUDY. 28. We have demonstrated that acting and experiencing were movements; that, among the movements, some are absolute, while others constitute actions or passions.[431] We have also demonstrated that the other things that are called genera must be reduced to the genera we have set forth.[432] We have also studied relation, defining it as a habit, a "manner of being" of one thing in respect of another, which results from the co-operation of two things; we have explained that, when a habit of being constitutes a reference, this thing is something relative, not so much as it is being, but as far as it is a part of this being, as are the hand, the head, the cause, the principle, or the element.[433] The relatives might be divided according to the scheme of the ancient (philosophers), by saying that some of them are efficient causes, while others are measures, that the former distinguish themselves by their resemblances and differences, while the latter consist in excess or in lack. Such are our views about the (categories, or) genera (of existence). THIRD ENNEAD, BOOK SEVEN. Of Time and Eternity.[435] A. ETERNITY. INTRODUCTION. ETERNITY EXISTS PERPETUALLY, WHILE TIME BECOMES.