Hippolytus, Refutation of All Heresies 9.8
Having demonstrated the succession of their genealogy, we must now also set forth the false teaching of their doctrines. First we will present the opinions of Heraclitus the Obscure, and then we will make clear which parts of this heresy are Heraclitean. The current leaders of the heresy stumbled upon these ideas but do not realize they come from the Obscure One; they think they come from Christ. If they encountered Heraclitus himself, even then they would be convinced and would stop their atheistic blasphemy. Although we have already expounded Heraclitus's system in the Philosophumena, we must bring it forward again now, so that through this closer refutation those who suppose they are disciples of Christ may be taught plainly that they are not his followers but followers of the Obscure One.
Greek
Ἀλλ᾿ ἐπεὶ τῆς γενεαλογίας αὐτῶν τὴν διαδοχὴν ἐπεδείξαμεν, δοκεῖ λοιπὸν καὶ τῶν δογμάτων τὴν κακοδιδασκαλίαν ἐκθέσθαι, [καὶ] πρότερον τὰ Ἡρακλείτῳ τῷ σκοτεινῷ δόξαντα παραθεμένους, ἔπειτα καὶ τὰ τούτων μέρη Ἡρακλείτεια ὄντα φανερῶσαι, ἃ τυχόντες οἱ νῦν προστάται τῆς αἱρέσεως οὐκ ἴσασιν ὄντα τοῦ σκοτεινοῦ, νομίζοντες εἶναι Χριστοῦ. Οἷς εἰ ἐνέτυχον, κἂν οὕτω δυσωπηθέντες παύσονται τῆς ἀθέου δυσφημίας. Ἀλλ᾿ εἰ καὶ πρότερον ἔκκειται ὑφ᾿ ἡμῶν ἐν τοῖς Φιλοσοφουμένοις ἡ δόξα Ἡρακλείτου, ἀλλά γε δοκεῖ προσαναπαραχθῆναι καὶ νῦν, ὅπως διὰ τοῦ ἐγγίονος ἐλέγχου φανερῶς διδαχθῶσιν οἱ τούτου νομίζοντες Χριστοῦ εἷναι μαθητάς, οὐκ ὄντας, ἀλλὰ τοῦ σκοτεινοῦ.