εἰς πᾶν ἀφῖγμαι κουδὲν εἴργασμαι πλέον

From LSJ

ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod

Source

English > Greek (Woodhouse Quotes Reversed)

I have tried all means and done no good