Abstract
Hippolytus of Rome on Aristotle’s definition of the soul. His work Concerning the Soul is obscure. For in the entire three books [where he treats of his subject] it is not possible to say clearly what is Aristotle’s opinion concerning the soul. For, as regards the definition which he furnishes of soul, it is easy [enough] to declare this; but what it is that is signified by the definition is difficult to discover. For soul, he says, is an entelecheia of a sôma physikon organikon; [but to explain] what this is at all, would require a very great number of arguments, and a lengthened investigation.