youthfully
From LSJ
τὸ γὰρ εὖ πράττειν παρὰ τὴν ἀξίαν ἀφορμὴ τοῦ κακῶς φρονεῖν τοῖς ἀνοήτοις γίγνεται → undeserved success engenders folly in unbalanced minds
Translations
Finnish: nuorekkaasti; French: juvénilement, en jeune homme; Greek: νεανικά; Ancient Greek: νεαρῶς; Italian: giovanilmente; Romanian: tinerește; Russian: по-юношески, с юношеским жаром; Spanish: de forma juvenil, juvenilmente, de manera juvenil