τὸ δὲ ποιεῖν ἄνευ νοῦ ἃ δοκεῖ καὶ σὺ ὁμολογεῖς κακὸν εἶναι: ἢ οὔ → but doing what one thinks fit without intelligence is—as you yourself admit, do you not?—an evil
οῦσα, όν :part. prés. de ἔπειμι².
see ἔπειμ Od. 9.2.
ἐπιών: οῦσα, όν part. к ἔπειμι II.