Compare Hermas, Mandat. I. Athan. Epist. de Decretis Nic. Syn. xxii.: οὕτω καὶ τὸ ἄτρεπτον καὶ ἀναλλοίωτον αὐτὸν εἶναι σωθήσεται. So Aristotle (Metaphys. XI. c. iv. 13) describes the First Cause as ἀπαθὲς καὶ ἀναλλοίωτον.