Lysippus, fr.7

εἰ μὴ τεθέασαι τὰς Ἀθήνας, στέλεχος εἶ,
εἰ δὲ τεθέασαι μὴ τεθήρευσαι δ’, ὄνος,
εἰ δ’ εὐαρεστῶν ἀποτρέχεις, κανθήλιος.

If you’ve never seen Athens, you’re a blockhead; if you have seen, but haven’t been enraptured, you’re an ass; and if you’re pleased to be leaving, you’re a packass.