Εἴκειν δ' οὐκ ἐπίσταται κακοῖς → You don't know how to yield to your misfortunes
P. and V. λαμπρῶς, P. φαιδρῶς (Xen.).
cheerfully: P. and V. εὐθύμως (Xen.); see also happily.