2 Peter 3:18

But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory both now and to the day of eternity. Amen.
2 Peter 3:18 · ESVView all translations

Peter closes his letter in the middle of a warning about false teachers, scoffers, and the danger of losing your footing. His last word is not a wall to hide behind but a command to move — grow — followed by praise.

The Answer to the Warning

Peter's last command answers the danger he has just named:

The believer, faced with this, is urged to holy conduct and godliness… There is a danger that the Christian will be contaminated by the spirit of the world. What then is the preservative? "Grow in the grace and knowledge of our Lord and Savior Jesus Christ."

William Kelly

A warning is only half the answer:

It is not enough to be warned against evil; we must be in the positive enjoyment of truth. The way not to go back is to go on. Like a man on a bicycle, the Christian must go on if he would avoid falling off.

F. B. Hole

What Growth Is

Years since conversion do not measure growth:

Growth has no direct connection with age. A man may be old and grey. He may have passed many a milestone since his conversion, and yet still be a stunted child spiritually.

F. B. Hole

It shows in what a person is becoming:

Growth, then, is a question of character. As we grow we are moulded more and more into conformity to Christ.

F. B. Hole

Growing "In Grace"

The word "grace" rules out a growth measured by rules kept:

Growing in grace stands in contrast to a legal attitude. It means deeply learning and valuing the grace of God in Christ Jesus. That grace lifts one above the level of all the surrounding evil.

Leslie M. Grant

Grace received shows in how a believer treats others, and there is no ceiling on it:

All true growth is in grace, the grace of God. Then as we expand in grace we grow in graciousness of spirit… Who can set a limit to our growth in grace and in the knowledge of the Lord? Both are without limit.

F. B. Hole

Growing in the Knowledge of Him

The second half of the command is not new to the letter. Peter has tied blessing to knowing Christ again and again:

For the fifth time in this short letter our blessing is connected with the knowledge of our Lord and Saviour Jesus Christ (2 Peter 1:2-3, 8; 2 Peter 2:20). The Apostle has pressed on us the value of the prophetic Scriptures, the commandments of the apostles, and the deep importance of resting on the Word of God. But he realises that merely knowing the letter will not keep us. Scripture is only rightly used as we gain through the word a deeper knowledge of our Lord and Saviour Jesus Christ.

Hamilton Smith

No other defence can take its place:

Nothing keeps you safe from error except a growing, deepening knowledge of the Lord Himself. Let us set our hearts on this most precious knowledge. The walls of no church structure, however strong, can give this security.

J. Wilson Smith

How It Happens

Growth needs feeding, and God feeds each believer Himself:

If we are really dependent on God, He will give us the right thing. He will put the right book into our hands. He will feed us with food suitable for us. So we receive it from Himself and hold it in communion with Himself. It is fresh, living, powerful, formative. It tells on the heart and shines in the life. So we grow in grace and in the knowledge of our Lord and Saviour Jesus Christ.

C. H. Mackintosh

"Both Now and to the Day of Eternity"

The letter ends by handing all the glory to Christ. The closing phrase reaches past this world's history:

Someone may have seen much of the grace of God when first coming to the knowledge of Christ. Even so, this should not, and does not, satisfy our soul, still less the Master… It is of the greatest importance to be also going forward in the ways of God… "To Him be the glory both now and [not simply for ever, but] to the day of eternity. Amen." Peter puts in view the day of eternity, with the new heavens and new earth, where everything that can be broken is gone.

The Bible Treasury

The little word "now" carries a question with it:

We all admit that glory will come to Him for ever, but we may well challenge our hearts by asking, Is He getting glory from our lives even now?

Hamilton Smith

Summary

- Danger — the verse before warns of losing your footing through the error of others. Growth is the answer.

- Direction — the way not to go back is to go on. A warning about evil is not enough without the positive enjoyment of truth.

- Grace — growth in grace is the opposite of a legal spirit, and it shows itself in a gracious spirit toward others.

- Knowledge — knowing the letter of Scripture will not keep anyone. Scripture does its work when it deepens your knowledge of Christ Himself, and no church structure can replace that safety.

- Glory — the growth ends in praise that runs from now to the day of eternity. Is He getting glory from our lives today?

Reviewed by Orion on August 18, 2026
2 Peter 3:18 Commentary | True Bible Answers