ἀλλὰ σὺ μὲν νῦν στῆθι καὶ ἄμπνυε → but you, stop now and catch your breath | but do thou now stand, and get thy breath
καρτερικῶς: терпеливо, стойко (σωφρόνως καὶ κ. ζῆν Arst.).