The sermon works through 1 Peter 1:22-25, identifying this as the fourth and final command in the chapter: "having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart." The preacher frames the whole of 1 Peter 1 as saturated with the theme of hope, and argues that this command to love cannot be understood apart from that theme — the strength to love one another earnestly and from the heart flows directly out of a sure hope in God.

To set the context, the sermon surveys the chapter from verse 3 onward. Peter blesses God for causing believers to be born again to a living hope through the resurrection of Jesus Christ, into an inheritance that is imperishable, undefiled, and unfading, kept in heaven for them. Verse 5 adds that believers themselves are being guarded by God's power through faith for a salvation ready to be revealed. Verse 7 compares this to gold refined by fire — but even refined gold is perishable, while the faith God preserves in his people is imperishable. Verse 13 then issues the first command, again tied to hope: to set one's hope fully on the grace to be revealed. Verse 21 sums this up: through Christ, believers have come to trust in God, who raised him from the dead and gave him glory, so that their faith and hope are in God. The sermon's thesis is that this fourth command — to love one another earnestly — is simply what a person who is truly full of hope in God looks like. Where genuine love for the brethren is absent, it may signal that hope in God is not truly present either.

The command in verse 22b is framed as standing on two supporting "legs," each giving a reason for love. The sermon addresses the second leg first: verses 23-25, which ground the command in new birth. Believers have been born again not of perishable seed but of imperishable, through the living and abiding word of God — identified as the gospel that was preached to them. The sermon connects this to verse 3, where the new birth comes through God's mercy and Christ's resurrection, showing a complete picture: God's mercy gives new life through the word (the gospel, centered on Christ's death and resurrection), and that word is itself imperishable. An extended illustration compares this to a heart surgeon who has already prepared a new, healthy heart for a patient whose own heart is failing — the "operation" of new birth requires the old life to be given up so the imperishable heart can be received. The preacher stresses that Peter's emphasis is not merely that the word gives life, but that the word itself endures forever, unlike grass and its flower, which wither and fall — quoting Isaiah 40 as Peter does in verse 24.

From there the sermon asks: what makes it so hard to obey the command to love earnestly, from the heart? The answer offered is that such love is costly — it may cost money, time, energy, comfort, emotional safety, even the risk of being misunderstood or rejected when love includes truthful correction. Ultimately, Christ's own love for humanity cost him his life. The sermon argues that people cling to money, comfort, health, and reputation because these are what the world offers as security, but Peter insists that all such things are like grass that withers, while only God's word remains forever. Because believers have been born of imperishable seed, their lives should bear the character of that seed — just as offspring resemble their parents — meaning hope should be anchored in what is eternal, not in what is passing. This frees believers from the fear of losing temporary things, echoing Christ's teaching that whoever loses his life for his sake will find it. A story about a pastor preaching for hours to a stadium crowd without a microphone after a power failure, and about missionaries returning from evangelistic campaigns in North Sumatra, illustrates costly love and sacrifice offered because the workers know their labor flows from an imperishable, eternal reality rather than a perishable one.

Turning to the first leg, verse 22a, the sermon explains that purification "by obedience to the truth" refers to belief in the gospel — the truth being God's word. This obedience of faith purifies believers from a life anchored in the perishable things the world chases, and it is precisely this purification that creates the capacity for sincere, wholehearted love of the brethren. Without new birth and faith in the truth, that capacity does not exist. The sermon closes by urging the congregation to become a people marked by earnest, self-sacrificial love for one another — through practical acts, time, presence, and prayer — grounded in the assurance that they have been born again by an imperishable seed and therefore need not fear paying love's cost.

Bible Verses Used

• 1 Peter 1:22-25: The sermon's central text and the fourth command in the chapter — love one another earnestly, grounded in purification through obedience to the truth and in new birth through the imperishable word of God.

• 1 Peter 1:3: Cited to show believers are born again to a living hope through Christ's resurrection, forming the basis for the new-birth theme developed in 1:23-25.

• 1 Peter 1:4: Describes the imperishable, undefiled, unfading inheritance kept in heaven, reinforcing the "imperishable" theme applied later to the word of God.

• 1 Peter 1:5: Notes believers are guarded by God's power through faith while awaiting salvation, tying hope to God's preserving work.

• 1 Peter 1:7: Contrasts perishable refined gold with imperishable faith, foreshadowing the perishable/imperishable contrast in 1:23-24.

• 1 Peter 1:13: The first command of the chapter — to set hope fully on grace — shown as another instance of the chapter's hope theme.

• 1 Peter 1:21: Summarizes that through Christ believers' faith and hope are set on God, used as the hinge connecting the earlier verses to the command in 1:22.

• Isaiah 40 (as quoted in 1 Peter 1:24): Used to contrast the withering grass and fading flower of worldly, temporary things with the enduring word of the Lord.

• Mark 8:35 (echoed, not quoted directly): Referenced as Jesus' teaching that whoever loses his life for his sake will find it, applied to the cost of earnest love.