As 1Co 5:12, 1Co 5:13; 1Th 4:12. Compare τοὺς ἔσω those within, 1Co 5:12.
Redeeming the time (τὸν καιρὸν ἐξαγοραζόμενοι)
Compare Eph 5:16, and Dan 2:8, Sept. The word is used in the New Testament only by Paul, Gal 3:13; Gal 4:5; Eph 5:16. The compounded preposition ἐξ has the meaning out of; as Gal 3:13, “Christ redeemed us out of the curse,” etc., and out and out, fully. So here and Eph 5:16, buy up. Rev., in margin, buying up the opportunity. The favorable opportunity becomes ours at the price of duty.