Eusebius of Caesarea, Church History 18
He has left us a great many notes that show a well‑educated mind diligently applied to divine matters, and they are full of every kind of help; we will direct eager learners to them, having usefully recorded what has come to our knowledge.
One of his works is an address to Antoninus — the one so named — and to his children and the Roman Senate, speaking on behalf of our doctrines; another is a second apology for our faith, addressed to the successor and namesake of that emperor, Aurelian Verus, whose deeds we will discuss in due course.
There is also a treatise to the Greeks in which he develops a long argument on many questions debated among us and the Greek philosophers, especially the nature of demons; we need not set that one out now.
Yet another writing of his addressed to the Greeks has reached us, titled "Refutation," and still another on the monarchy of God, which he establishes not only from our own Scriptures but also from Greek books.
On these works a certain "Psalter" was composed, and there is also a scholastic treatise "On the Soul" in which, after laying out various opinions on the problem at hand, he presents the views of the Greek philosophers; he promises to answer those views and to set forth his own opinion in another work.
Greek
Πλεῖστα δὲ οὗτος καταλέλοιπεν ἡμῖν πεπαιδευμένης διανοίας καὶ περὶ τὰ θεῖα ἐσπουδακυίας ὑπομνήματα, πάσης ὠφελείας ἔμπλεα· ἐφ’ ἃ τοὺς φιλομαθεῖς ἀναπέμψομεν, τὰ εἰς ἡμετέραν γνῶσιν ἐλθόντα χρησίμως παρασημηνάμενοι. ὁ μέν τίς ἐστιν αὐτῷ λόγος πρὸς ’ Αντωνῖνον τὸν προσαγορευθέντα καὶ τοὺς τούτου παῖδας τήν τε Ῥωμαίων σύγκλητον προσφωνητικὸς ὑπὲρ τῶν καθ’ ἡμᾶς δογμάτων, ὁ δὲ δευτέραν περιέχων ὑπὲρ τῆς ἡμετέρας πίστεως ἀπολογίαν, ἢν πρὸς τὸν τοῦ δεδηλωμένου αὐτοκράτορος διάδοχόν τε καὶ ὁμώνυμον Ἀωτωνῖνον Οὐῆρον, οὗ τὰ κατὰ τοὺς χρόνους ἐπὶ τοῦ παρόντος διέξιμεν· καὶ ἄλλος ὁ πρὸς Ἕλληνας, ἐν ᾧ μακρὸν περὶ πλείστων παρ’ ἡμῖν τε καὶ τοῖς Ἑλλήνων φιλοσόφοις ζητουμένων κατατείνας λόγον, περὶ τῆς τῶν δαιμόνων διαλαμβάνει φύσεως· ἃ οὐδὲν ἄν ἐπείγοι τὰ νῦν παρατίθεσθαι. καὶ αὖθις ἕτερον πρὸς Ἕλληνας εἰς ἡμᾶς ἐλήλυθεν αὐτοῦ σύγγραμμα, δ’ καὶ ἐπέγραφεν Ἕλεγχον, καὶ παρὰ τούτους ἄλλο περὶ θεοῦ μοναρχίας, ἢν οὐ μόνον ἐκ τῶν παρ’ ἡμῖν γραφῶν, ἀλλὰ καὶ τῶν Ἑλληνικῶν συνίστησιν βιβλίων· ἐπὶ τούτοις ἐπιγεγραμμένον Ψάλτης, καὶ ἄλλο σχολικὸν Περὶ ψυχῆς, ἐν ᾧ διαφόρους πεύσεις προτείνας περὶ τοῦ κατὰ τὴν ὑπόθεσιν προβλήματος , τῶν παρ’ Ἕλλησιν Φιλοσόφων παρατίοθεται τὰς δόξας, αἷς καὶ ἀντιλέξειν ὑπισχνεῖται τήν τε αὐτὸς αὐτοῦ δόξαν ἐν ἑτέρῳ παραθήσεσθαι συγγράμματι.