All Essence or Substance seems to signify _Hoc Aliquid Unum Numero_. The First Essence really does so signify, but the Second Essence does not really so signify: it only seems to do so, because it is enunciated by a substantive name, like the First.[40] It signifies really _Tale Aliquid_, answering to the enquiry _Quale Quid_? for it is said not merely of one thing numerically, but of many things each numerically one. Nevertheless, a distinction must be drawn. The Second Essence does not (like the Accident, such as white) signify _Tale Aliquid_ simply and absolutely, or that and nothing more. It signifies _Talem Aliquam Essentiam_; it declares what the Essence is, or marks off the characteristic feature of various First Essences, each _Unum Numero_. The Genus marks off a greater number of such than the Species.[41] [Footnote 40: Aristot. Categ. p. 3, b. 10-16: [Greek: Pa=sa de\ ou)si/a _dokei=_ to/de ti sêmai/nein. e)pi\ me\n ou)=n tô=n prô/tôn ou)siô=n a)namphisbê/têton kai\ a)lêthe/s e)stin o(/ti to/de ti sêmai/nei; a)/tomon ga\r kai\ e(\n a)rithmô=| to\ dêlou/meno/n e)stin; e)pi\ de\ tô=n deute/rôn ou)siô=n _phai/netai me\n o(moi/ôs tô=| schê/mati tê=s prosêgori/as to/de ti sêmai/nein_, o(/tan ei)/pê| a)/nthrôpon ê)\ zô=|on, _ou) mê\n a)lêthe/s ge_, a)lla\ ma=llon poio/n ti sêmai/nei.]] [Footnote 41: Ibid. p. 3, b. 18-24.] Again, Essences have no contraries.[42] But this is not peculiar to Essences, for _Quanta_ also have no contraries; there is nothing contrary to ten, or to that which is two cubits long. Nor is any one of the varieties of First Essence more or less Essence than any other variety. An individual man is as much Essence as an individual horse, neither more nor less. Nor is he at one time more a man than he was at another time; though he may become more or less white, more or less handsome.[43] [Footnote 42: Ibid. b. 24-30.] [Footnote 43: Ibid. b. 34, seq.]