So also, in regard to the intercommunion of Forms, skill and art are required to decide which of them will come together, and which will not. In every special art and profession the case is similar: the ignorant man will fail in deciding this question--the man of special skill alone will succeed.--So in regard to the intercommunion of Forms or Genera universally with each other, the comprehensive science of the true philosopher is required to decide.[58] To note and study these Forms, is the purpose of the philosopher in his dialectics or ratiocinative debate. He can trace the one Form or Idea, stretching through a great many separate particulars; he can distinguish it from all different Forms: he knows which Forms are not merely distinct from each other, but incapable of alliance and reciprocally repulsive--which of them are capable of complete conjunction, the one circumscribing and comprehending the other--and which of them admit conjunction partial and occasional with each other.[59] The philosopher thus keeps close to the Form of eternal and unchangeable Ens or Reality--a region of such bright light that the eyes of the vulgar cannot clearly see him: while the Sophist on the other hand is also difficult to be seen, but for an opposite reason--from the darkness of that region of Non-Ens or Non-Reality wherein he carries on his routine-work.[60] [Footnote 58: Plato, Sophist. p. 253 B. [Greek: a)=r' ou) met' e)pistê/mês tino\s a)nagkai=on dia\ tô=n lo/gôn poreu/esthai to\n o)rthô=s me/llonta dei/xein poi=a poi/ois sumphônei= tô=n genô=n kai\ poi=a a)/llêla ou) de/chetai?]] [Footnote 59: Plato, Sophist. p. 253 D-E.] [Footnote 60: Plato, Sophist. p. 254 A. [Greek: O( de/ ge philo/sophos, tê=| tou= o)/ntos a)ei\ dia\ logismô=n proskei/menos i)de/a|, dia\ to\ lampro\n au)= tê=s chô/ras ou)damô=s eu)pe/tês o)phthê=nai; ta\ ga\r tê=s tô=n pollô=n psuchê=s o)/mmata karterei=n pro\s to\ thei=on a)phorô=nta a)du/nata.]] [Side-note: He comes to enquire what Non-Ens is. He takes for examination five principal Forms--Motion--Rest--Ens--Same--Different.]