Plato, Laws 657d

ἆρʼ οὖν οὐχ ἡμῶν οἱ μὲν νέοι αὐτοὶ χορεύειν ἕτοιμοι, τὸ δὲ τῶν πρεσβυτέρων ἡμῶν ἐκείνους αὖ θεωροῦντες διάγειν ἡγούμεθα πρεπόντως, χαίροντες τῇ ἐκείνων παιδιᾷ τε καὶ ἑορτάσει, ἐπειδὴ τὸ παρʼ ἡμῖν ἡμᾶς ἐλαφρὸν ἐκλείπει νῦν, ὃ ποθοῦντες καὶ ἀσπαζόμενοι τίθεμεν οὕτως ἀγῶνας τοῖς δυναμένοις ἡμᾶς ὅτι μάλιστʼ εἰς τὴν νεότητα μνήμῃ ἐπεγείρειν; ἀληθέστατα. μῶν οὖν οἰόμεθα καὶ κομιδῇ μάτην τὸν νῦν λεγόμενον

Now while our young men are fitted for actually dancing themselves, we elders regard ourselves as suitably employed in looking on at them, and enjoying their sport and merrymaking, now that our former nimbleness is leaving us; and it is our yearning regret for this that causes us to propose such contests for those who can best arouse in us through recollection, the dormant emotions of youth. Very true. Thus we shall not dismiss as entirely groundless the opinion now