[quote=Plutarch]τοὺς δὲ φρονίμους ἔλεγε μᾶλλον ὑπὸ τῶν ἀφρόνων ἢ τοὺς ἄφρονας ὑπὸ τῶν φρονίμων ὠφελεῖσθαι: τούτους μὲν γὰρ φυλάττεσθαι τὰς ἐκείνων ἁμαρτίας, ἐκείνους δὲ τὰς τούτων μὴ μιμεῖσθαι κατορθώσεις... 

"Wise men, [Cato] said, profited more from fools than fools from wise men; for the wise shun the mistakes of fools, but fools do not imitate the successes of the wise".[/quote]