Plato, Laws 633c

πρὸς τὰς καρτερήσεις, χειμώνων τε ἀνυποδησίαι καὶ ἀστρωσίαι καὶ ἄνευ θεραπόντων αὐτοῖς ἑαυτῶν διακονήσεις νύκτωρ τε πλανωμένων διὰ πάσης τῆς χώρας καὶ μεθʼ ἡμέραν. ἔτι δὲ κἀν ταῖς γυμνοπαιδίαις δειναὶ καρτερήσεις παρʼ ἡμῖν γίγνονται τῇ τοῦ πνίγους ῥώμῃ διαμαχομένων, καὶ πάμπολλα ἕτερα, σχεδὸν ὅσα οὐκ ἂν παύσαιτό τις ἑκάστοτε διεξιών. εὖ γε, ὦ Λακεδαιμόνιε ξένε, λέγεις. τὴν ἀνδρείαν δέ, φέρε, τί θῶμεν; πότερον ἁπλῶς οὕτως εἶναι πρὸς φόβους

in hardihood, as the men go bare-foot in winter and sleep without coverlets and have no attendants, but wait on themselves and rove through the whole countryside both by night and by day. Moreover in our games, we have severe tests of endurance, when men unclad do battle with the violence of the heat,—and there are other instances so numerous that the recital of them would be well-nigh endless. Splendid, O Stranger of Lacedaemon! But come now, as to courage, how shall we define it? Shall we define it quite simply as battling against fears and pains only,