v1-2: Physical suffering is linked with breaking from sins, rather than the direct result of committing sins. Here then is a clear benefit of enduring suffering. The meaning here is actually broader than persecution; to suffer in the flesh means to identify with Christ through baptism. Thus, the command is for all who have trusted in Christ, and obeyed Him in baptism.
We have received new life, with new desires and motives; through our enduring suffering, we learn to put away sinful attitudes, and grow in our faith.
v3: See also Eph 2.3; Peter looks back. Before conversion we lived as unbelievers; and none of us can claim a past life of sinlessness. However, we are all called to break with these past things.
v4: Since we have new attitudes and new actions, we find we also have new friends. Old friends think it strange that we live as we do.
v5: Those who reject the testimony of Christ through our lives will be judged for their rebellion.
v6: Only the gospel gives life to the dead. All have heard; those who reject will be condemned.
v7: The end of all things, see 2 Pet 3.11. What should our response be? The closing of this age is a motivation to godly living. We must be serious, watchful in prayer; Peter learned something of this in Gethsemane.
v8-9: Have fervent love, be hospitable.
v10-11: We have a responsibility to serve faithfully, using the gifts God has given to "each one," as in Rom 12.3; 1 Cor 12.7; Eph 4.7. Our speaking ministry must be with authority and faithfulness; and all ministry must be in God's strength.
‘In fact, when a man speaks God’s word without feeling the power of it in himself, what else is he doing but farce? And what a sacrilege that is! What a pollution of God’s words!’ (John Calvin, Sermons from Job)
v12-13: Sharing in Christ's sufferings now, a promise of the glory to come; Acts 5.41; Rom 8.18.
v14: Phil 1.28; deliberate persecution is a sword that divides believer from unbeliever.
v15: Another reminder that the Christian should not suffer as an evil-doer. The list includes what we might deem 'major' and 'minor' sins; the Bible makes no such distinction. Indeed, those things which we treat as less serious are generally more serious.
v16: We are not to be ashamed if we suffer for Christ's sake; it is a good thing, since God may be glorified.
v17-18: God the Judge; and we are all accountable to Him. The quotation here is from Prov 11.31, where the emphasis is on recompense on the earth; Peter's emphasis here is that such recompense is certain.
We need to understand the meaning here. Peter is not saying that Christians are scarcely saved. It is the ‘righteous’ who are scarcely saved; those who seek to live righteously without knowing Christ as Saviour. The NT never states that Christians, who are destined to enjoy abundant life in Christ, can be ‘scarcely saved.’
v19: Conclusion; trust God in all things, including those times when we suffer.