have kept a borrowed term, calling that _persona_ which they call [Greek: hupostasis]; but Greece with its richer vocabulary gives the name [Greek: hupostasis] to the individual subsistence. And, if I may use Greek in dealing with matters which were first mooted by Greeks before they came to be interpreted in Latin: [Greek: hai ousiai en men tois katholou einai dunantai. en de tois atomois kai kata meros monois huphistantai], that is: essences indeed can have potential existence in universals, but they have particular substantial existence in particulars alone. For it is from particulars that all our comprehension of universals is taken. Wherefore since subsistences are present in universals but acquire substance in particulars they rightly gave the name [Greek: hupostasis] to subsistences which acquired substance through the medium of particulars. For to no one using his eyes with any care or penetration will subsistence and substance appear identical. For our equivalents of the Greek terms [Greek: ousiosis ousiosthai] are respectively _subsistentia_ and _subsistere_, while their [Greek: hupostasis huphistasthai] are represented by our _substantia_ and _substare_. For a thing has subsistence when it does not require accidents in order to be, but that thing has substance which supplies to other things, accidents to wit, a substrate enabling them to be; for it "substands" those things so long as it is subjected to accidents. Thus genera and species have only subsistence, for accidents do not attach to genera and species. But particulars have not only subsistence but substance, for they, no more than generals, depend on accidents for their Being; for they are already provided with their proper and specific differences and they enable accidents to be by supplying them with a substrate. Wherefore _esse_ and _subsistere_ represent [Greek: einai] and [Greek: ousiosthai], while _substare_ represents [Greek: huphistasthai]. For Greece is not, as Marcus Tullius[62] playfully says, short of words, but provides exact equivalents for _essentia, subsistentia, substantia_ and _persona_--[Greek: ousia] for _essentia_, [Greek: ousiosis] for _subsistentia_, [Greek: hupostasis] for _substantia_, [Greek: prosopon] for _persona_. But the Greeks called individual substances [Greek: hupostaseis] because they underlie the rest and offer support and substrate to what are called accidents; and we in our term call them substances as being substrate--[Greek: hupostaseis], and since they also term the same substances [Greek: prosopa], we too may call them persons. So [Greek: ousia] is identical with essence, [Greek: ousiosis] with subsistence, [Greek: hupostasis] with substance, [Greek: prosopon] with person. But the reason why the Greek does not use [Greek: hupostasis] of irrational animals while we apply the term substance to