Plato, Laws 795b

καὶ ἐν ὀργάνοις τοιούτοις οὐδὲν μέγα· σιδηροῖς δʼ εἰς τὸν πόλεμον ὅταν δέῃ χρῆσθαι, μέγα διαφέρει, καὶ τόξοις καὶ ἀκοντίοις καὶ ἑκάστοις τούτων, πολὺ δὲ μέγιστον, ὅταν ὅπλοις δέῃ πρὸς ὅπλα χρῆσθαι. διαφέρει δὲ πάμπολυ μαθὼν μὴ μαθόντος καὶ ὁ γυμνασάμενος τοῦ μὴ γεγυμνασμένου. καθάπερ γὰρ ὁ τελέως παγκράτιον ἠσκηκὼς ἢ πυγμὴν ἢ πάλην οὐκ ἀπὸ μὲν τῶν ἀριστερῶν ἀδύνατός ἐστι μάχεσθαι, χωλαίνει δὲ καὶ ἐφέλκεται πλημμελῶν, ὁπόταν αὐτόν τις

and similar implements; but when it is a case of using iron instruments of war—bows, darts and the like—it matters a great deal, and most of all when weapon is to be used against weapon at close quarters. There is a vast difference here between the taught and the untaught, the trained and the untrained warrior. For just as the athlete who is thoroughly practiced in the pancratium or in boxing or wrestling is capable of fighting on his left side, and does not move that side as if it were numb