ἀρκτέον

I. (ἄρχομαι) one must begin, τι πρᾶγμα S. Aj. 853; πάλιν ἀ. ἀπ’ ἀρχῆς one must make a fresh start, Pl. Ti. 48b; ἀπὸ τοῦ πρώτου, τῶν πρώτων, τῶν γνωρίμων ἀ., Arist. Metaph. 1013a3, GA 737b25, EN 1095b2, cf. Str. 15.1.1.

II. (ἄρχω) one must govern, τινί τινος Isoc. 14.10: abs., S. OT 628, al. (you must be ruled, i.e. obey).