6. ὁ φρονῶν τὴν ἡμ. Cf. Rom 8:5; Php 3:19; Col 3:2; Mar 8:33 (|[275] Mt.).
[275] | parallel to
κυρίῳ φρονεῖ. Dat. to denote the person whose interest is affected, Blass p. 111. Anarthrous κύριος is used (1) after O.T. as a name for GOD, passim. (2) of Christ, very rarely without the addition of Ἰ. or Χρ. or both: and then only with a preposition (2Co 11:17; Eph 6:8 = Col 3:20 (?); 1Th 5:17) or in gen. after anarthrous subst. (1Co 7:25; 1Th 4:15; 2Ti 2:24). There is no clear parallel to the use in this passage if we take κ. as = the Lord Christ.
So tr. to a master: he has a master to whom he is responsible and in view of whom he forms his opinion; the master is Christ. See next verse.