Origen of Alexandria, Against Celsus 6.16
After these things, Celsus claims that Jesus's pronouncement against the rich—"It is easier for a camel to go through the eye of a needle than for a rich person to enter the kingdom of God" (Matt 19:24)—was taken directly from Plato, and that Jesus corrupted the Platonic saying. Plato had said, "It is impossible to be good in a surpassing way and to be rich in a surpassing way." Who, among those who believe in Jesus or among other people, would not laugh at Celsus if they could only give moderate attention to the matter? Celsus heard that Jesus, born and raised among the Jews and regarded as the son of Joseph "the carpenter," had learned no letters, neither Greek nor Hebrew—a fact the truthful writings about him also attest. Yet Celsus says Jesus read Plato, was pleased with his statement about the rich—that "it is impossible to be good and rich"—and then corrupted it into the camel-and-needle saying. If Celsus had approached the Gospels without hatred and malice, but as a truth-seeker, he would have paused to ask why a camel, an animal crooked in its very construction, was compared to a rich person. He would have asked what the narrow "eye of the needle" meant to Jesus, who said the road leading "to life" is narrow and hard pressed. He would have noted that the camel is written in the Law as "unclean," having something acceptable in its humility but also something blameworthy in its failure to chew the cud. He would have examined how often and for what reasons a camel appears in the divine Scriptures, so as to see the intention behind the statement about the rich. He would not have left unexamined Jesus's blessing of the poor and condemnation of the rich—whether these refer to the physically poor and rich, or whether the word blesses a certain poverty and condemns a certain wealth. For not even a chance passerby would praise the poor indiscriminately, since many of them have base characters. But let these things stand as they are.
Greek
Μετὰ ταῦτα τὴν κατὰ τῶν πλουσίων ἀπόφασιν τοῦ Ἰησοῦ, εἰπόντος· „εὐκοπώτερον κάμηλον εἰσελθεῖν διὰ τρήματος ῥαφίδος ἢ πλούσιον εἰς τὴν βασιλείαν τοῦ θεοῦ,“ φησὶν ἄντικρυς ἀπὸ Πλάτωνος εἰρῆσθαι, τοῦ Ἰησοῦ παραφθείροντος τὸ Πλατωνικὸν, ἐν οἷς εἶπεν ὁ Πλάτων ὅτι „ἀγαθὸν ὄντα διαφόρως καὶ πλούσιον εἶναι διαφερόντως εἶναι ἀδύνατον.“ τίς δ᾿ οὐκ ἂν καὶ μετρίως ἐφιστάνειν τοῖς πράγμασι δυνάμενος τὸν Κέλσον γελάσαι, οὐ τῶν πιστευόντων τῷ Ἰησοῦ μόνων ἀλλὰ καὶ τῶν λοιπῶν ἀνθρώπων. ἀκούων ὅτι Ἰησοῦς ὁ παρὰ Ἰουδαίοις γεγενημένος καὶ ἀνατεθραμμένος καὶ Ἰωσὴφ „τοῦ τέκτονος“ νομισθεὶς εἶναι υἱὸς καὶ μηδὲ γράμματα μεμαθηκὼς οὐ μόνον τὰ Ἑλλήνων ἀλλ᾿ οὐδὲ τὰ Ἑβραίων, ὅπερ καὶ αἱ φιλαλήθεις μαρτυροῦσι γραφαὶ τῶν περὶ αὐτὸν, ἀνέγνω Πλάτωνα καὶ ἀρεσθεὶς τῇ περὶ τῶν πλουσίων ἀποφαινομένῃ αὐτοῦ λέξει, ὡς „ἀδύνατόν ἐστιν ἀγαθὸν εἶναι διαφερόντως καὶ πλούσιον,“ παρέφθειρεν αὐτὴν καὶ πεποίηκε τὸ „εὐκοπώτερον κάμηλον διὰ τρήματος ῥαφίδος εἰσελθεῖν ἢ πλούσιον εἰς τὴν βασιλείαν τοῦ θεοῦ“; εἰ δὲ μὴ μετὰ τοῦ μισεῖν καὶ ἀπεχθάνεσθαι ἐντυχὼν τοῖς εὐαγγελίοις φιλαλήθης ἦν ὁ Κέλσος, ἐπέστησεν ἂν, τί δή ποτε παρελήφθη κάμηλος, τὸ τῶν ζῴων ὅσον ἐπὶ τῇ κατασκευῇ σκολιὸν, παραβαλλόμενον τῷ πλουσίῳ, καὶ τί αὐτῷ ἐβούλετο ἡ στενὴ „τῆς ῥαφίδος“ τρυμαλιὰ, στενὴν φάσκοντι εἶναι καὶ τεθλιμμένην τὴν ὁδὸν τὴν ἀπάγουσαν „εἰς τὴν ζωὴν,“ καὶ τὸ κατὰ τὸν νόμον δὲ „ἀκάθαρτον“ τὸ ζῷον ἀναγεγράφθαι τοῦτο, ἔχον μέν τι ἀποδεκτὸν τὸ μαρυκᾶσθαι, ἔχον δὲ καὶ ψεκτὸν τὸ μὴ διχηλεῖν· ἐξήτασεν ἂν καὶ ὁσάκις ἐν ταῖς θείαις παρελήφθη κάμηλος γραφαῖς καὶ ἐπὶ τίνων, ἵνα θεωρήσῃ τὸ περὶ τῶν πλουσίων τοῦ λόγου βούλημα· οὐκ εἴασεν ἂν ἀβασάνιστον καὶ τὸ μακαρίζεσθαι μὲν τοὺς πτωχοὺς ὑπὸ τοῦ Ἰησοῦ ταλανίζεσθαι δὲ τοὺς πλουσίους πότερον ἐπὶ τῶν αἰσθητῶν αὐτῷ ταῦτα . . . . πτωχῶν καὶ πλουσίων, ἢ οἶδέ τινα πτωχείαν πάντως μακαριζομένην ὁ λόγος καὶ πλοῦτον πάντως ψεκτόν· οὐκ ἂν γὰρ οὐδ᾿ ὁ τυχὼν ἀκρίτως τοὺς πτωχοὺς ἐπῄνεσεν, ὧν οἱ πολλοὶ καὶ φαυλόττοί εἰσι τὰ ἤθη. ἀλλὰ ταῦτα μὲν ταύτῃ.