ἐξεπίσταμαι
From LSJ
ὃς ἂν βούληται τῆν γῆν κινῆσαι κινησάτω τὸ πρῶτον ἑαυτόν → let him that would move the world first move himself
English (LSJ)
A know thoroughly, τι Hdt.2.43, 5.93: c. part., know well that .., ἐ. τὸν Κῦρον οὐκ ἀτρεμίζοντα Id.1.190, cf. S.OC1584; τὸν θεὸν τοιοῦτον (sc. ὄντα) ἐ. Id.Fr.771: c. inf., know well how to do, Id.Ant.480: with εὖ, Hdt.3.146, A.Ag.838; καλῶς S.OC417, etc.: c. acc. et inf.; know that, Id.Ant.293. II know by heart, τὸν λόγον Pl.Phdr.228b.