συμμέτρησις
From LSJ
τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds
English (LSJ)
εως, ἡ,
A measuring by comparison, ἡ ξ. τῶν κλιμάκων computation of their length, Th.3.20; τῇ σ. καὶ συμφερόντων καὶ ἀσυμφόρων Epicur.Ep.3p.63U., cf. Phld.Ir.p.76 W.; τοῦ χρόνου D.H.Lys.5, cf. Herod.Med. ap. Orib.10.5.4.