τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds
percis: ĭdis, f., a false reading for pegris, Plin. 32, 11, 53, § 150.
percis, idis. f. :: 角魚