τὰ γὰρ κακὰ παράδειγμα τοῖς ἐσθλοῖσιν εἴσοψίν τ' ἔχει
From LSJ
Μιμοῦ τὰ σεμνά, μὴ κακῶν μιμοῦ τρόπους → Graves imitatormores, ne imitator malos → Das Edle nimm zum Vorbild, nicht der Schlechten Art
English > Greek (Woodhouse Quotes Reversed)
evil deeds serve as an example and visible warning to the good