Dio Chrysostom, the 68th Discourse On Opinion
“Most people practice however many things they do or desire even though they don’t understand about any of them what kind of thing they are or what type of benefit they provide—they are compelled by opinion or pleasure or habit to these things. It is the same too in however many things they avoid and are careful not to do: they do not abstain because they know it is harmful or what kind of harm certain matters threaten, but because they see others taking care concerning these things or just because they have been in the habit of caution regarding affairs or because they imagine that these matters must be unpleasant for them and present what seems to be toilsome, they are really suspicious of them.
And, in addition, the matter of pleasure and toil is common to all people even though some people are slaves to them more than others. But opinion is ungoverned and is not the same for all. This is why some people praise these things and carp at those and others often do the complete opposite.”
Οἱ πολλοὶ ἄνθρωποι ὁπόσα ἐπιτηδεύουσιν ἢ ζηλοῦσιν, οὐδὲν αὐτῶν εἰδότες ὁποῖόν ἐστιν οὐδὲ ἥντινα ἔχει ὠφέλειαν ἐπιτηδεύουσιν, ἀλλ᾿ ὑπὸ δόξης ἢ ἡδονῆς ἢ συνηθείας ἀγόμενοι πρὸς αὐτά· οὐδ᾿ αὖ ὅσων ἀπέχονται καὶ εὐλαβοῦνται μὴ πράττειν, εἰδότες ἃ βλάπτει ἀπέχονται οὐδὲ ὁποίαν τινὰ φέρει τὴν βλάβην, ἀλλὰ καὶ τούτων ὅσα ὁρῶσι τοὺς ἄλλους εὐλαβουμένους ἢ περὶ ὧν ἂν εἰς ἔθος καταστῶσιν ὥστε εὐλαβεῖσθαι, ἢ ἃ νομίζουσιν ἀηδῆ ἔσεσθαι αὐτοῖς καὶ πόνον τινὰ δοκεῖ ἔχειν, ὡς τὸ πολὺ ταῦτα ὑποπτεύουσιν.
Καὶ τὸ μὲν τῆς ἡδονῆς καὶ τὸ τοῦ πόνου πᾶσι κοινόν· ἀλλ᾿ οἱ μὲν ἧττον, οἱ δὲ1 μᾶλλον ὑπ᾿ αὐτῶν δουλοῦνται· τὸ δὲ τῆς δόξης ἀνόμοιον καὶ οὐ ταὐτὸ πᾶσιν. ὅθεν οἱ μὲν ταῦτα, οἱ δὲ ταῦτα ἐπαινοῦσι καὶ ψέγουσι, πολλάκις τἀναντία.