Plato, Laws 803d

πῶς; νῦν μέν που τὰς σπουδὰς οἴονται δεῖν ἕνεκα τῶν παιδιῶν γίγνεσθαι· τὰ γὰρ περὶ τὸν πόλεμον ἡγοῦνται σπουδαῖα ὄντα τῆς εἰρήνης ἕνεκα δεῖν εὖ τίθεσθαι. τὸ δʼ ἦν ἐν πολέμῳ μὲν ἄρα οὔτʼ οὖν παιδιὰ πεφυκυῖα οὔτʼ αὖ παιδεία ποτὲ ἡμῖν ἀξιόλογος, οὔτε οὖσα οὔτʼ ἐσομένη, ὃ δή φαμεν ἡμῖν γε εἶναι σπουδαιότατον· δεῖ δὴ τὸν κατʼ εἰρήνην βίον ἕκαστον πλεῖστόν τε καὶ ἄριστον διεξελθεῖν. τίς οὖν

How so? Now they imagine that serious work should be done for the sake of play; for they think that it is for the sake of peace that the serious work of war needs to be well conducted. But as a matter of fact we, it would seem, do not find in war, either as existing or likely to exist, either real play or education worthy of the name, which is what we assert to be in our eyes the most serious thing. It is the life of peace that everyone should live as much and as well as he can. What then is the right way? We should live out our lives playing