Plato, Letters 312b

καταπεφρόνηκας, ἄλλα δʼ ἐσπούδακας. ταῦτα δὴ διαβεβόηται. ὃ δὴ μετὰ ταῦτα δίκαιόν ἐστι ποιεῖν, ἄκουε, ἵνα σοι καὶ ἀποκρίνωμαι ὃ σὺ ἐρωτᾷς, πῶς χρὴ ἔχειν ἐμὲ καὶ σὲ πρὸς ἀλλήλους. εἰ μὲν ὅλως φιλοσοφίας καταπεφρόνηκας, ἐᾶν χαίρειν, εἰ δὲ παρʼ ἑτέρου ἀκήκοας ἢ αὐτὸς βελτίονα ηὕρηκας τῶν παρʼ ἐμοί, ἐκεῖνα τίμα· εἰ δʼ ἄρα τὰ παρʼ ἡμῶν σοι ἀρέσκει, τιμητέον καὶ ἐμὲ μάλιστα. νῦν οὖν, ὥσπερ καὶ ἐξ ἀρχῆς, σὺ καθηγοῦ, ἕψομαι δὲ ἐγώ· τιμώμενος γὰρ

and were devoted to other affairs. This certainly was the story noised abroad. And now I will tell you what it is right to do after this, that so I may reply also to your question how you and I ought to behave towards each other. If you altogether despise philosophy, leave it alone. If, again, you have been taught by someone else or have yourself invented better doctrines than mine, hold them in honor. But if you are contented with my doctrines, then you should hold me also in special honor. So now, just as at the beginning, do you lead the way and I will follow. If I am honored