no foreign source, holding them from itself, and within itself. It is simultaneously the goal of thought, because it is stability that never needed a beginning, and the principle from which thought was born, because it is unborn stability; for movement can neither originate from, nor tend towards movement. The idea also belongs to the genus of stability, because it is the goal (or limit) of intelligence; but the intellectual actualization by which it is thought constitutes movement. Thus all these things form but one thing; and movement, stability, and the things which exist in all essences constitute genera (or classifications). Moreover, every essence posterior to these genera is, in its turn, also definite essence, definite stability, and definite movement. THIS TRIUNE PLAY IMPLIES ALSO IDENTITY AND DIFFERENCE. Summing up what we have discovered about the nature of Essence, we find first three genera. Then, these three, Essence, Movement and Stability were contemplated respectively by the essence, movement and stability within ourselves, which we also harmonized with those intelligibles. Then again we lost the power of distinguishing them by uniting, confusing, and blending these three genera. But a little later we divided, extricated and distinguished them so as again to see essence, movement and stability; three things, of which each exists apart. The result of this process then is that they are regarded as different, discerning them by their differences, and recognizing difference in essence by positing three things each of which exists apart. On the other hand, if they be considered in their relation with unity and in unity, if they be all reduced to being something single and identical, one may see the arising, or rather the existing of identity. To the three genera already recognized, therefore, we shall have to add identity or difference, or (in Platonic language[308]), "sameness and other-ness." These two classifications added to the three others, will in all make five genera for all things. Identity and difference (are genuine genera, indeed, because they) also communicate their characteristics to inferior (beings), each of which manifests some such element. THESE FIVE GENERA ARE PRIMARY BECAUSE NOTHING CAN BE AFFIRMED OF THEM. These five genera that we thus recognize are primary, because nothing can be predicated of them in the category of existence (being). No doubt, because they are essences, essence might be predicated of them; but essence would not be predicated of them because "being" is not a particular essence. Neither is essence to be predicated of movement or stability, for these are species of essence. Neither does essence participate in these four genera as if they were superior genera under which essence itself would be subsumed; for stability, movement, identity and difference do not protrude beyond the sphere of essence, and are not anterior thereto.