Be Holy as He Is Holy

Read 1 Peter 1:13–25 before proceeding. Keep your Bible open throughout this session.

Since you have been born again, not of perishable seed but of imperishable, through the living and abiding word of God…

— 1 Peter 1:23

Gospel, Then Ethic

Having spent ten verses reminding his readers what they have received, Peter now turns to the shape of the life that flows from it. His opening word is therefore. Therefore, preparing your minds for action and being sober-minded, set your hope fully on the grace that will be brought to you at the revelation of Jesus Christ. The therefore matters enormously. Peter does not begin the ethical section of his letter with bare commands. He begins with a connection. Because of what you have received, now do this. The Gospel is not left behind when the ethics begin; the Gospel is the ground on which the ethics stand.

This pattern is everywhere in the New Testament. Paul’s letters famously divide into doctrinal sections followed by ethical sections, with a therefore at the hinge. The Ten Commandments begin with the declaration that the Lord brought Israel out of Egypt, and only then proceed to the commandments themselves. The Christian moral life is never presented in Scripture as a bare demand; it is always presented as the response appropriate to gifts already received. Peter’s therefore is not stylistic. It is structural. The life of holiness he is about to describe is the living out of the new birth he has just proclaimed.

This is deep Lutheran territory. The distinction between Law and Gospel is not a distinction between the Old Testament and the New; both run throughout both. But the order is always the same. Gospel comes first. The Gospel creates the Christian, who then lives the Christian life as the fruit of what has been given. A command laid on someone who has not first received the Gospel will crush him or turn him into a legalist. A command laid on someone who has received the Gospel calls forth the life that was already his by gift. Peter knows this. And his letter will move through command after command — hope fully, be holy, love one another, live as servants of God — all of it resting on the Gospel foundation of verses three through twelve.

In this session we will walk through the passage carefully. We will look at the call to prepare our minds and set our hope on what is coming. We will see how Peter grounds his call to holiness in the holiness of the Father who has called us. We will examine his reminder that we have been ransomed by the precious blood of Christ, and what that ransom means for how we now live. And we will close with one of the most beautiful passages on the Word of God in the New Testament — the imperishable seed that remains forever, the Word that was preached to us and that is the ground of our new birth.

Preparing Your Minds for Action

The first exhortation is practical. Prepare your minds for action. The Greek expression literally means something like gird up the loins of your mind. In the ancient world, long robes were worn loosely by men going about ordinary business. But when action was required — when a man needed to run, fight, or work hard — he would gather up the skirts of his robe, tuck them into his belt, and free his legs for motion. This tucking up of the robe was called girding up the loins, and it signaled readiness for action.

Peter applies this physical image to the mental life. Gird up the loins of your mind. Get your thinking ready. Tuck in the loose ends. Prepare yourself mentally for what is coming, so that you will not be caught flat-footed by circumstances. The Christian life, Peter is telling his readers, requires mental preparation. It is not lived well by those who drift along without thinking. It is lived well by those who have girded up their minds, who know what they believe, who are ready to respond to whatever comes.

Sober-Minded

The second word, sober-minded, reinforces the first. The Greek word suggests self-control, clear thinking, the absence of intoxication and emotional disturbance. The sober-minded Christian is not carried away by passions, by the latest excitement, by the momentary emotional current. He holds his course. He thinks clearly. He sees things as they actually are.

This is a particularly valuable virtue for the suffering Christian. Trials have a way of disordering the mind. Pain clouds judgment. Fear distorts perception. The Christian under pressure is tempted to react rather than to think, to be tossed by every gust of circumstance rather than steered by his convictions. Peter knows this, and he calls his readers to the opposite. Prepare your minds. Be sober-minded. Think clearly, even when things are hard.

Set Your Hope Fully

The third imperative is the most striking. Set your hope fully on the grace that will be brought to you at the revelation of Jesus Christ. Two things deserve attention here. First, the word fully. Peter does not call for partial hope, hedged hope, hope that keeps one foot in other possibilities. He calls for hope set fully — completely, without remainder — on the grace that is coming at the revelation of Christ.

Second, the object of the hope is grace. Not earned reward. Not achievement. Not personal glory. Grace. The same grace that has already appeared in Christ’s first coming will be brought in fullness at His second coming. The Christian’s future is not uncertain. It is grace. And the Christian is called to set his hope on that grace with his whole heart, not divided between the grace that is coming and lesser things that might be hoped for in this life.

This is countercultural in every age, including our own. The world is full of competing hopes — hopes for success, for comfort, for recognition, for health, for the fulfillment of various ambitions. None of these is wrong in itself. But none of them is the Christian’s hope. The Christian’s hope is set fully on the grace that is coming at the revelation of Jesus Christ. Everything else is held more loosely. If it comes, we thank the Lord. If it does not come, our hope is not disturbed, because it was never anchored there in the first place.

Peter now turns to the positive command that shapes the rest of this section. As obedient children, do not be conformed to the passions of your former ignorance, but as He who called you is holy, you also be holy in all your conduct, since it is written, You shall be holy, for I am holy.

The grounding of the command is crucial. Peter does not merely demand holiness. He grounds the demand in two realities — the identity of the Christian as an obedient child, and the holiness of the God who has called him. Both grounds matter, and both are rooted in what has already happened in the believer’s life.

Obedient Children

The language of children is significant. Peter’s readers are not subjects receiving orders from a distant monarch. They are children receiving direction from their Father. The relationship is familial, not merely legal. And the obedience being called for is the obedience appropriate to children — the responsive love of those who know they are loved, not the grudging compliance of those who fear the consequences of disobedience.

This is an important frame for Christian ethics. The Christian does not obey God because he is afraid of punishment. He obeys God because he is God’s child, having been born again into this new relationship, and the obedience flows from the love that the new birth has created. When Christians operate from fear rather than from filial love, something has gone wrong with their understanding of who they are. Peter is reminding his readers that they are children of a Father who has called them to Himself, and that their obedience is the response of children, not the performance of slaves.

Do Not Be Conformed

The negative side of the exhortation is to not be conformed to the passions of your former ignorance. The word conformed suggests being pressed into a mold, taking on the shape of something outside oneself. Before their conversion, Peter’s readers were shaped by the passions of their ignorance — the desires of the fallen flesh, the values of their culture, the patterns of life everyone around them lived. Now that they have been born again, they are called not to be shaped by those same patterns any longer.

Notice the word former. Peter is describing a break with a past. The ignorant passions are the passions of who they used to be, not of who they are now. To continue being shaped by them is to fail to live into the new identity that has been given. This is not a call to spiritual effort against great odds. It is a call to live out the reality of what has already happened. The new birth has taken place. The shaping forces that were once decisive no longer need to be. What is needed is for the Christian to live into the new reality rather than slipping back into the old.

Holy as He Is Holy

The positive side is that the Christian is called to be holy in all conduct, because the God who called him is holy. The quotation from Leviticus — Be holy, for I am holy — recurs throughout Leviticus, grounding Israel’s holiness in the Lord’s own. Peter extends this to the Church. The holiness of the Christian is not optional because the holiness of God is not optional. God’s holiness demands our holiness, and His holiness makes our holiness possible.

The word holy can be misleading. In ordinary English, it often suggests unusual religious intensity — the holy person is the one who prays more than the rest of us, attends more services, visibly practices more devotion. Biblical holiness is different. The root meaning of the word is set apart. A holy thing is a thing set apart for God, distinct from ordinary things, belonging to Him. A holy person is a person set apart for God, distinct from the surrounding culture in visible and invisible ways, belonging to the Lord.

To be holy in all conduct, then, is to live as one who belongs to God. Not to blend in with the surrounding culture when its values run against the Lord’s. Not to take the world’s patterns as normative for Christian life. Not to treat the new birth as a private spiritual experience with no visible consequences. The holy person looks different, because he belongs to someone different. The holy life is visibly Christian, because it is shaped by the one whose own is.

The Price That Was Paid

Peter now provides another ground for the call to holiness. And if you call on Him as Father who judges impartially according to each one’s deeds, conduct yourselves with fear throughout the time of your exile, knowing that you were ransomed from the futile ways inherited from your forefathers, not with perishable things such as silver or gold, but with the precious blood of Christ, like that of a lamb without blemish or spot.

The logic is piercing. If you pray to God as Father — and Peter’s readers do, every time they pray — you are praying to the one who will judge impartially. No favorites. No exemptions. No special deals. The same God who is their Father is the Judge, and the Judge will weigh each life according to its deeds. This should produce, Peter says, a fear. Not servile fear, not the terror of the condemned, but the reverent fear of one who takes God’s holiness and God’s judgment with full seriousness.

The Time of Your Exile

Notice how Peter returns to the exile theme of the opening. Conduct yourselves with fear throughout the time of your exile. The exile frame from verse one of the letter is still in play. The Christian’s life in the world is the life of a sojourner, and that sojourner is called to conduct himself, during the exile, with the appropriate fear of his Father who is also his Judge. The exile has a definite duration — it is a time, not eternity. But during that time, the Christian is to live in a way that takes God’s holiness seriously.

Ransomed

Peter then gives the deepest ground for the call to holiness. His readers have been ransomed. The Greek word refers to the payment of a price to free someone from slavery or captivity. In the ancient world, slaves could be purchased and freed, and the price paid was called the ransom. Peter is saying that his readers, who once were in bondage, have been ransomed — set free by the payment of a price.

What were they ransomed from? From the futile ways inherited from their forefathers. Peter’s readers, whether Jewish or Gentile, had come from religious and cultural backgrounds that had not been able to save them. Gentile paganism had its patterns of life, but those patterns led to futility. Jewish tradition had its patterns, but apart from Christ those patterns could not reach their goal. The inherited ways were futile — not necessarily evil in every case, but unable to accomplish what they were supposed to accomplish. The Christian has been ransomed from that futility.

The price of the ransom is the stunning part. Not perishable things such as silver or gold, but the precious blood of Christ. Silver and gold were the ordinary currencies of the ancient world, and they were highly valuable. But they are perishable. They can be lost, stolen, devalued, or spent. The blood of Christ is not perishable. It is the precious blood of one who was without blemish or spot — the language of the sacrificial system, which required animals that were flawless.

The doctrine here is substitutionary atonement, though Peter does not use that phrase. Christ, the spotless Lamb of God, gave His own blood as the ransom price. His death was the payment that set His people free. This is the core of the Gospel that Lutherans have confessed from the beginning — Christ for us, dying in our place, shedding His blood as the satisfaction for our sins. Peter grounds the Christian’s whole ethical life in this. You were ransomed at infinite cost. Now live in a way that honors the price that was paid.

Foreknown Before the Foundation of the World

Peter adds one more layer. He was foreknown before the foundation of the world but was made manifest in the last times for the sake of you who through Him are believers in God, who raised Him from the dead and gave Him glory, so that your faith and hope are in God.

Christ’s atoning work was not an improvisation. It was not a last-resort plan devised when other options had failed. It was foreknown before the foundation of the world. The cross stands in the eternal purpose of God, known and intended from the beginning. And it was made manifest in the last times — in the decisive moment of history, when the fullness of time had come, and the Son was sent to accomplish what had been planned from eternity.

And notice the end of the sentence. For the sake of you who through Him are believers in God. The whole arc runs for our sake. The eternal plan, the incarnation, the cross, the resurrection, the giving of glory to the Son — all of it is for the sake of those who now believe. Your faith and hope, Peter tells his readers, are in God. You are not the accidental recipients of something that was really about someone else. You are the intended beneficiaries of what was planned from before the foundation of the world. This is staggering, and Peter wants his readers to feel its weight.

Love One Another from a Pure Heart

Having established the grounds of the ethical life, Peter now turns to its social dimension. Having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart.

Notice how Peter describes what has already happened. The readers have purified their souls by their obedience to the truth. This is not a claim that they have achieved moral perfection. It is a claim that the act of coming to faith — the obedience that received the Gospel when it was preached — has itself been purifying. The Word, when received in faith, cleanses. The soul that has received the truth is a soul that has been washed.

And this purification has a purpose. It is for sincere brotherly love. The cleansing that has taken place in the new birth enables a new capacity — the capacity to love fellow believers from a pure heart. The old self, shaped by the passions of former ignorance, could not produce this kind of love. The new self, born again through the Word, can. And Peter calls his readers to live into this new capacity.

Earnestly, from a Pure Heart

The two adverbs matter. Earnestly means with intensity, with real effort, with serious engagement. This is not casual affection. It is not pleasant politeness. It is love that is given with the whole self. From a pure heart means without mixed motives, without self-interest disguised as care, without the complications of resentment or self-regard that often attach to our relationships.

This is a high standard for the life of the congregation. Christians are called to love one another with intensity, and from a pure heart. Not the performance of love while something else festers underneath. Not the habit of tolerance that passes for love in most human communities. The real thing. The love that takes the other seriously, serves them genuinely, and does not grow weary.

Peter knows this is hard. He knows his readers will not perfectly achieve it, any more than any other Christians ever have. But the calling is the calling. The goal of the new birth, in its social dimension, is the kind of community where believers love one another the way Christ has loved them. The congregation that is marked by this love is bearing witness, by its very existence, to the reality of the Gospel that created it.

The Imperishable Seed of the Word

Peter closes this section with a final passage of remarkable beauty, grounding the love he has just called for in the Word that gave his readers their new birth. Since you have been born again, not of perishable seed but of imperishable, through the living and abiding word of God.

The agricultural image is exact. Seed is planted. The seed grows into the plant. The plant produces fruit. In this image, the seed from which the Christian life has sprung is the Word of God. The Word was planted in the soil of the hearer’s heart. The Word generated new life. The new life is what Peter has been describing throughout the passage — the obedient children, the holiness, the love for one another. All of it traces back to the seed.

Imperishable Seed

And the seed is imperishable. Ordinary seed is perishable. It grows for a season. It can fail to sprout. It can be eaten by birds, choked by weeds, scorched by heat. But the imperishable seed of the Word does not fail. It does not fade. It does not die. It carries within itself the life of the one who gave it. And the new birth that flowed from it is therefore a birth into life that shares the same imperishable character.

This is connected to the living hope of verse three, the imperishable inheritance of verse four, and the tested faith more precious than gold of verse seven. A pattern is emerging across the passage. What the world offers is perishable — silver and gold, ordinary seed, fading flowers, passing flesh. What God gives is imperishable — the inheritance, the seed, the Word, the love, the life that flows from all of them. The Christian is embedded in what does not pass away.

All Flesh Is Grass

Peter quotes Isaiah to underline the contrast. All flesh is like grass and all its glory like the flower of grass. The grass withers, and the flower falls, but the word of the Lord remains forever. Isaiah’s image is haunting. The field of wild grass and flowers is beautiful in spring, glorious for a season, gone by late summer. This is the nature of all flesh, including our own. Our strength fades. Our glory passes. Our beauty becomes memory.

But the Word of the Lord remains forever. It was true in Isaiah’s day and it is true now. The Word endures across generations, across civilizations, across the collapse of empires and the withering of every merely human glory. And it is this eternal Word, Peter says, that has been preached to you. The good news that was preached to you is the word that was foretold by Isaiah — the word that outlasts all flesh, that generates new life in those who receive it, that cannot fail and cannot fade.

The Word That Was Preached to You

And the final word of the section is pastoral and grounding. This word is the good news that was preached to you. The Word that gave Peter’s readers their new birth is the same Word that came through ordinary preaching — through missionaries, through teachers, through the apostolic witness that spread across the Roman provinces. The Word is not remote. It is not locked away in heaven. It is the Word that was spoken to them by the one who preached, that was received by them in faith, and that has generated in them the life they now live.

This is deeply Lutheran. The Word comes to us through ordinary means — through preaching, through catechesis, through the Scriptures read aloud, through the sacraments that enact the Word visibly. The Christian is not born again through a private spiritual experience disconnected from the ordinary means. The Christian is born again through the Word that is preached. And the Word that was preached — to Peter’s readers and to us — is the imperishable seed that remains forever. We stand on the Word, and the Word does not fail.

Gathering the Threads

Peter has moved, in this passage, from the Gospel foundation of verses three through twelve to the ethical life that flows from it. Prepare your minds for action. Set your hope fully on the grace that is coming. Be holy as the God who called you is holy. Conduct yourself with fear during your exile, remembering the precious blood by which you were ransomed. Love one another earnestly from a pure heart. Stand on the imperishable seed of the Word that has given you new birth.

These exhortations are not a burden laid on top of the Gospel. They are the shape of the life that the Gospel has created. Peter knows that what God has made new must also live new. The baptized cannot continue as if nothing had changed. The new birth produces a new way of being in the world. And the rest of the letter will spell out what this new way looks like in the ordinary circumstances of his readers’ lives — in their homes, their work, their communities, their suffering. All of it is rooted in what Peter has laid down here.

For the Lutheran Christian, this passage is a model of how ethics flows from Gospel. The indicative comes first. The new birth has happened. The living hope is real. The inheritance is kept. The Word has produced us. Only then come the imperatives. Hope fully. Be holy. Love earnestly. These imperatives are not optional and not peripheral, but they are always secondary — responses to the primary reality of what God has done. To invert the order is to produce legalism on the one hand or moral laxity on the other. To keep the order is to produce the life Peter is describing — the life of the baptized Christian, shaped by the Word, oriented toward the grace that is coming.

For Discussion

The following questions are for group discussion or personal reflection.

Peter begins the ethical section with the word therefore. How does it shape your understanding of Christian moral life to see that every command in this passage rests on what has already been received? Why is this order so important?
Peter calls his readers to set their hope fully on the grace coming at the revelation of Christ. In what other places do you notice your own hope being set? What would it mean to set it fully on the right object?
The call to be holy as God is holy can feel overwhelming. How does grounding holiness in being set apart as children of the Father rather than in unusual religious intensity change how you hear the call?
Peter grounds the call to holiness in the precious blood of Christ by which we were ransomed. How does meditation on the cross change the way you think about Christian obedience?
Christians are called to love one another earnestly, from a pure heart. Where in your congregation or your Christian relationships is this most lived out? Where is it most challenged?
The Word of the Lord remains forever, while all flesh is grass. How does this contrast shape your priorities? What in your life are you investing in that is grass, and what are you investing in that is the Word?

Looking Ahead

Next week we move into chapter two. Peter will call his readers, as newborn infants, to long for the pure spiritual milk of the Word. He will describe them as living stones being built into a spiritual house, and he will give them the most stunning identity statement in the letter — they are a chosen race, a royal priesthood, a holy nation, a people for God’s own possession. This is the high point of the letter’s doctrine of the Church, and it grounds everything that follows about how Christians live in the world.

Before next session, read 1 Peter 2:1–10 at least twice. Pay attention to the accumulation of Old Testament language Peter applies to the Christian Church. Notice how he weaves together stones, priesthood, nation, and possession. And remember the frame we have been building: Peter is speaking to elect exiles, and the identity he is giving them in this passage is the foundation of their life as a people in the world.

Closing Prayer

Holy Father, who have called us to be Your own, grant us to live as Your obedient children. Teach us to prepare our minds, to be sober, and to set our hope fully on the grace that is coming. Make us holy, not by our own effort, but by the power of Your Word and Spirit working in us. We thank You for the precious blood of Christ, by which You have ransomed us from the futility of our former lives. Plant the imperishable seed of Your Word ever more deeply in us, and produce in us the love for one another that bears witness to Your Gospel. Through the same Jesus Christ our Lord. Amen.