Forasmuch then as Christ suffered for us in the flesh, arm yourselves also with the same mind; for he who has suffered in the flesh has ceased from sin;
ceased from sin -- The main verb can be either MIDDLE (A. T. Robertson’s Word Pictures of the New Testament, p. 121) or PASSIVE (Moulton’s Analytical Greek Lexicon and Barbara and Tim Friberg’s Analytical Greek New Testament). If it is MIDDLE it is encouraging believers to be actively involved in not sinning as followers of Christ’s example. If PASSIVE it is emphasizing the spiritual fact of the believer’s deliverance from the power of sin.