Hippolytus

“ Now, with the view of explaining, by means of an illustration, what has been said concerning the Saviour, (I may say that) the power of thought [1] which I have by nature is proper and suitable to me, as being possessed of a rational and intelligent soul; and to this soul there pertains, according to nature, a self-moved energy and first power, ever-moving, to wit, the thought that streams from it naturally. ”

“ For it is only in objects of the same nature that there is the motion that works the same works, showing that the being [8] whose power is natural is incapable in any manner of being or becoming the possession of a being of a different nature without mutation. [9] ”

“ The text runs thus: ὁμοφυῶν γὰρ μόνων ἡ ταυτουργός ἐστι κίνησις σημαίνουσα τὴν οὐσίαν, ἧς φυσικὴ καθέστηκε δύναμις, ἑτεροφυοῦς ἰδιότητος οὐσίας εἶναι κατ ̓ οὐδένα λόγον, ἢ γενέσθαι δίχα τροπῆς δυναμένην. ”