διαθεῖν: cf. Theaet. 148c εἰ διαθέων τοῦ ἀκμάζοντος καὶ ταχίστου ἡττήθης if in a race you had been beaten by a man full grown and very swift. διαθεῖν τε καί is inserted διὰ μέσου (see on 327 a), and τῴ depends upon ἕπεσθαι. In many compounds διά expresses a race.
ἀλλ᾽ οὐ γάρ: see H. 1050, 4, d.
συγκαθεῖναι: intr., as are many compounds of ἱέναι. Cf. 338 a, 1. 21, Theaet. 168 b ἵλεῳ τῇ διανοίᾳ συγκαθεὶς ὡς ἀληθῶς σκέψει in a spirit genial and sincerely accommodating, you will search, Rep. viii. 563 a οἱ δὲ γέροντες ξυγκαθιέντες τοῖς νέοις εὐτραπελίας τε καὶ χαριεντισμοῦ ἐμπίπλανται.
