Literally, “incessantly pray,” with emphasis in the Greek on the idea of continuity (cf. on v. 16). There should be a constant spirit of prayer breathing through the Christian’s life. Never must the connection with Heaven be broken (see on Luke 18:1). Paul labored “night and day” (1 Thess. 2:9); he also prayed “night and day” (ch. 3:10). His many activities did not crowd out his prayers. Active connection with his heavenly Father was always maintaine 1. So it should be with us. Compare the prayer life of Jesus (see on Mark 3:13).