Lesson 5 — Prepare Your Minds, Set Your Hope Fully

¹³Therefore, 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.¹⁴As obedient children, do not be conformed to the passions of your former ignorance,¹⁵but as he who called you is holy, you also be holy in all your conduct,¹⁶since it is written, "You shall be holy, for I am holy."1 Peter 1:13–16

For twelve verses Peter has only given us indicatives, statements of what God has done. Now comes the first imperative, and the word that opens it is "Therefore." That little word is the hinge of the Christian life. Everything Peter has built in verses 3 to 12 (mercy, new birth, living hope, an inheritance kept, a faith refined) now presses forward into commands. Grace never ends in a sigh of relief. It ends in a life reshaped. Notice where the reshaping begins: not with the hands, not with the mouth, but with the mind.

1. The mind girded for action

The first command is a picture: "preparing your minds for action" (1:13). The literal image behind the Greek is older and earthier, literally "girding up the loins of your mind." In the ancient world a man wore a long robe, and to run or to work or to fight he had to gather the loose cloth and tuck it into his belt. Loose cloth trips you. Peter says: do that to your mind. Gather up the trailing, distracted, lazy thoughts, and tie them down (Henry on 1 Pet 1:13).

Notice thisHoliness begins with thinking, not feeling. The first arena of Christian obedience is the mind. A scattered mind cannot carry a holy life for long. Before Peter says a word about conduct, he says: gather your thoughts.

Alongside it, "being sober-minded." The word (nēphontes) means clear-headed, free from intoxication, whether by wine or by fantasy or by fear. A sober mind is an undrugged mind, awake to reality. The sober-minded believer sees both the trial and the hope without distortion. David Guzik is right that Peter's order matters: "hope that is fixed on grace" needs a mind that is both gathered and clear (Guzik on 1 Pet 1:13).

2. Hope set fully on grace

The main verb of verse 13 is in the middle: "set your hope fully on the grace that will be brought to you at the revelation of Jesus Christ." Three things deserve attention.

Fully (teleiōs) — not partly on grace and partly on something else. Hope divided is hope diluted. Peter wants our hope undivided.
On grace — not on our progress, not on the approval of people, not on circumstances turning out. On grace. The same ground that saved us is the ground we set our hope on now.
Brought to you at the revelation — hope faces forward, to the day Christ is unveiled. We hope for a Person, and for the grace He brings in His hand when He comes.

So the first command is a hope command, before it is a holiness command. Adrian Rogers captures the sequence: fix your hope on the grace to come, and the life will follow (Rogers, on 1 Pet 1:13). Peter does not start with "be better." He starts with "set your hope fully."

3. Not conformed to former passions

Verse 14 turns to what we leave: "As obedient children, do not be conformed to the passions of your former ignorance." Notice the family language: obedient children (literally "children of obedience"). Peter does not say "behave like slaves." He says, you are children, and children of a holy Father carry the family likeness. Obedience is not hired work; it is the reflex of a child.

And the command is negative first: do not be conformed. The word (syschēmatizomenoi) is the same root Paul uses in Romans 12:2, "do not be conformed to this world." It means to be poured into a mold, to let an external pattern press you into its shape. Peter warns against the old mold: "the passions of your former ignorance" (1:14). Before they knew God, these believers lived from appetites they did not understand. That was the old shape. The new shape is different.

The devotional pointSin is not just bad behavior; it is the residue of an old ignorance, the pattern of a life that did not know God. Holiness is not just effort; it is letting the new family shape replace the old mold, thought by thought, choice by choice.

4. Holy, because He is holy

Now the heart of the passage: "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'" (1:15-16). Peter quotes Leviticus (19:2; 11:44-45; 20:7), where God gave the same command to Israel at Sinai. Now he lays it on the church. The standard has not dropped. The God who called Israel is the God who has called us, and He has not changed.

Notice the logic. Holiness is not first a standard to meet; it is a Person to resemble. "As he who called you is holy, you also be holy." The holy God reproduces His own likeness in His children. Holiness is the family resemblance. And the scope is total: "in all your conduct" (anastrophē), the whole visible way of life, at the dinner table and at work and in private. Nothing is exempt.

This is also where the priesthood through-line sounds again. The command "be holy, for I am holy" was first given to the people God was making a kingdom of priests (Ex 19:5-6). Peter, writing to the new priesthood, reaches back and takes the same calling onto the church. A holy priesthood serves a holy God.

The single takeawayGrace has made us children of a holy Father, and the first thing His children do is gather their minds, set their hope fully on the grace to come, refuse the old mold, and take up the family likeness: holy, in all of conduct, because He is holy.

Try thisTake one ordinary part of your conduct this week, the way you speak at meals, the way you handle money, the way you react when delayed, and ask the single question Peter puts here: does this look like my Father? Let one small corner of your conduct be deliberately reshaped to the family likeness this week.

Application — head, heart, hands

Head. Believe that holiness is rooted in who God is and who He has made you, not in self-improvement. The standard is His character, and the power is the grace you hope for. Grace and holiness are not rivals; grace is the soil holiness grows from.

Heart. Cultivate the affection of an obedient child, not the dread of a hired servant. Mortify the old passions that were formed in ignorance, and the quiet pride that thinks it can manage sin without a gathered mind and a fixed hope.

Hands. Gird up your mind. Pick one trailing, lazy thought pattern and tie it down this week. Set your hope fully on grace, not partly, and let one area of your conduct visibly bear the family likeness of the holy God who called you.

Check your understanding

What is the first arena of obedience in verse 13?

The hands, doing visible and public good works
The mind, gathered up and made sober-minded
The feelings, stirred toward warmer devotion
The schedule, reordered around the church

Peter begins with the mind: "preparing your minds for action" and "being sober-minded" (1:13). Holiness starts with gathered, clear-headed thinking before it reaches conduct. A scattered mind cannot sustain a holy life.

Check your understanding

On what does Peter tell us to set our hope?

On the grace brought at Christ's revelation
On the approval of our believing neighbors
On our steady growth in personal conduct
On the wisdom of our former traditions

Hope is to be set "fully on the grace that will be brought to you at the revelation of Jesus Christ" (1:13). Fully, not partly; on grace, not on self or circumstances; and forward, to the day Christ is unveiled.

Check your understanding

Why are believers to be holy, according to verse 16?

Because holiness earns the inheritance now
Because holiness impresses the watching world
Because the God who called them is holy
Because holiness avoids all earthly suffering

Quoting Leviticus, Peter grounds the command in God's own character: "You shall be holy, for I am holy" (1:16). Holiness is the family likeness of the children of a holy Father, not a standard standing on its own.

Read for the next lessonRead David Guzik on 1 Peter 1:17-21, and re-read verse 16 until the family-likeness shape of holiness settles in. The next lesson goes deeper into the price and the pattern of this holiness: 1 Peter 1:17–21, "Because I Am Holy," where Peter shows the precious blood that ransomed us from the old life.