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;
He that hath suffered in the flesh hath ceased from sin ... This does not mean that Christ, after suffering, rested from sin; on the other hand, the entire final clause of the verse regards the status of Christians.  As Caffin said, "The apostle first spoke of the Master, then turned to the disciple.[1] The thing primarily in view here is exactly the Christian teaching expounded by Paul in  Romans 6:1-11; and Barclay said of that passage in this context, "We think that is what Peter is thinking here."[2] As baptized believers in Christ, Peter's readers, so soon to undergo persecutions are here admonished to live above sin.  "In Christ" they are already dead to sin; they must live above it.  As Kelcy said, "Not that the one who has ceased from sin is without sin, but that his life is not a life of sin (1 John 1:8,10).[3] The thought of this whole verse is that, just as Christ's suffering preceded his glorification, so also, for the Christian, his death to sin, and the patient endurance even of physical death itself, if necessary, shall likewise precede a similar glorification for him.[4]