Pseudo-Hippocrates, Letter 9.360 (Full text on the Scaife viewer)
“I [Hippocrates] said, “Know that you should explain the reason for your laughter.” And [Democritus], after glaring at me for a bit, said, “you believe that there are two reasons for my laughter, good things and bad things. But I laugh for one reason: the human being. Humans are full of ignorance but empty of correct affairs, acting like babies in their little plots, and also laboring over endless toil without winning any profit.
Humans travel to the ends of the earth and over the uncharted wilds with unchecked desires, minting silver and gold and never stopping in the pursuit of possession, but always throwing a fit for more, so that there’s never one bit less than others have. And then, they are not at all ashamed to call themselves happy.”
[ΙΠ.] “ἴσθι δὲ νῦν περὶ σέο γέλωτος τῷ βίῳ λόγον δώσων.”
ὁ δὲ μάλα τρανὸν ἐπιδών μοι, “δύο,” φησὶ, “τοῦ ἐμοῦ γέλωτος αἰτίας δοκέεις, ἀγαθὰ καὶ φαῦλα· ἐγὼ δὲ ἕνα γελῶ τὸν ἄνθρωπον, ἀνοίης μὲν γέμοντα, κενεὸν δὲ πρηγμάτων ὀρθῶν, πάσῃσιν ἐπιβουλῇσι νηπιάζοντα, καὶ μηδεμιῆς ἕνεκεν ὠφελείης ἀλγέοντα τοὺς ἀνηνύτους μόχθους, πείρατα γῆς καὶ ἀορίστους μυχοὺς ἀμέτροισιν ἐπιθυμίῃσιν ὁδεύοντα, ἄργυρον τήκοντα καὶ χρυσὸν, καὶ μὴ παυόμενον τῆς κτήσιος ταύτης, αἰεὶ δὲ θορυβεύμενον περὶ τὸ πλέον, ὅκως αὐτοῦ ἐλάσσων μὴ γένηται· καὶ οὐδὲν αἰσχύνεται λεγόμενος εὐδαίμων [. . .].”