ἡγούμενος τῶν ἡδονῶν ἀλλ' οὐκ ἀγόμενος ὑπ' αὐτῶν → of his pleasures he was the master and not their servant
unyielding: P. ἰσχυρός, V. ἔμπεδος.
firm, secure: P. and V. βέβαιος.
persevering: P. and V. λιπαρής (Plato), Ar. γλισχρός.
ceaseless: P. ἄπαυστος; see incessant.