But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen.

People's New Testament

3:18 Grow in grace. How they may so grow was shown in 1Pe 2:2.

And in the knowledge of our Lord. The two kinds of growth must keep equal pace. He who grows in the one will grow in the other.

Wesley's Notes

3:18 But grow in grace - That is, in every Christian temper. There may be, for a time, grace without growth; as there may be natural life without growth. But such sickly life, of soul or body, will end in death, and every day draw nigher to it. Health is the means of both natural and spiritual growth. If the remaining evil of our fallen nature be not daily mortified, it will, like an evil humour in the body, destroy the whole man. But if ye through the Spirit do mortify the deeds of the body, (only so far as we do this,) ye shall live the life of faith, holiness, happiness. The end and design of grace being purchased and bestowed on us, is to destroy the image of the earthy, and restore us to that of the heavenly. And so far as it does this, it truly profits us; and also makes way for more of the heavenly gift, that we may at last be filled with all the fulness of God. The strength and well - being of a Christian depend on what his soul feeds on, as the health of the body depends on whatever we make our daily food. If we feed on what is according to our nature, we grow; if not, we pine away and die. The soul is of the nature of God, and nothing but what is according to his holiness can agree with it. Sin, of every kind, starves the soul, and makes it consume away. Let us not try to invert the order of God in his new creation: we shall only deceive ourselves. It is easy to forsake the will of God, and follow our own; but this will bring leanness into the soul. It is easy to satisfy ourselves without being possessed of the holiness and happiness of the gospel. It is easy to call these frames and feelings, and then to oppose faith to one and Christ to the other. Frames (allowing the expression) are no other than heavenly tempers, the mind that was in Christ. Feelings are the divine consolations of the Holy Ghost shed abroad in the heart of him that truly believes. And wherever faith is, and wherever Christ is, there are these blessed frames and feelings. If they are not in us, it is a sure sign that though the wilderness became a pool, the pool is become a wilderness again. And in the knowledge of Christ - That is, in faith, the root of all. To him be the glory to the day of eternity - An expression naturally flowing from that sense which the apostle had felt in his soul throughout this whole chapter . Eternity is a day without night, without interruption, without end.

Scofield Reference Notes

[1] grace

Grace (imparted). Summary (see "Grace,") See Scofield Note: "Jn 1:17" grace is not only dispensationally a method of divine dealing in salvation

See Scofield Note: "Jn 1:17" but is also the method of God in the believer's life and service. As saved, he is "not under the law, but under grace" Rom 6:14. Having by grace brought the believer into the highest conceivable position. Eph 1:6. God ceaselessly works through grace, to impart to, and perfect in him, corresponding graces Jn 15:4,5 Gal 5:22,23.

Grace, therefore, stands connected with service Rom 12:6 15:15,16 1Cor 1:3-7 3:10 15:10 2Cor 12:9,10 Gal 2:9 Eph 3:7,8 Eph 4:7 Phil 1:7 2Tim 2:1,2 1Pet 4:10 with Christian growth 2Cor 1:12 Eph 4:29 Col 3:16 4:6 2Th 1:12 Heb 4:16 12:28,29 13:9 Jas 4:6 1Pet 1:2 3:7 5:5,10 2Pet 3:18 Jude 1:4 and with giving 2Cor 4:15 8:1,6,7,19 9:14

Margin grace

Grace (imparted). Rom 6:1 2Pet 3:18.

Jamieson-Fausset-Brown Bible Commentary

18. grow-Not only do not "fall from" (2Pe 3:17), but grow onward: the true secret of not going backward. Eph 4:15, "Grow up into Him, the Head, Christ."

grace and . knowledge of . Christ-"the grace and knowledge of Christ" [Alford rightly]: the grace of which Christ is the author, and the knowledge of which Christ is the object.

for ever-Greek, "to the day of eternity": the day that has no end: "the day of the Lord," beginning with the Lord's coming.

Matthew Henry's Concise Commentary

3:11-18 From the doctrine of Christ's second coming, we are exhorted to purity and godliness. This is the effect of real knowledge. Very exact and universal holiness is enjoined, not resting in any low measure or degree. True Christians look for new heavens and a new earth; freed from the vanity to which things present are subject, and the sin they are polluted with. Those only who are clothed with the righteousness of Christ, and sanctified by the Holy Ghost, shall be admitted to dwell in this holy place. He is faithful, who has promised. Those, whose sins are pardoned, and their peace made with God, are the only safe and happy people; therefore follow after peace, and that with all men; follow after holiness as well as peace. Never expect to be found at that day of God in peace, if you are lazy and idle in this your day, in which we must finish the work given us to do. Only the diligent Christian will be the happy Christian in the day of the Lord. Our Lord will suddenly come to us, or shortly call us to him; and shall he find us idle? Learn to make a right use of the patience of our Lord, who as yet delays his coming. Proud, carnal, and corrupt men, seek to wrest some things into a seeming agreement with their wicked doctrines. But this is no reason why St. Paul's epistles, or any other part of the Scriptures, should be laid aside; for men, left to themselves, pervert every gift of God. Then let us seek to have our minds prepared for receiving things hard to be understood, by putting in practice things which are more easy to be understood. But there must be self-denial and suspicion of ourselves, and submission to the authority of Christ Jesus, before we can heartily receive all the truths of the gospel, therefore we are in great danger of rejecting the truth. And whatever opinions and thoughts of men are not according to the law of God, and warranted by it, the believer disclaims and abhors. Those who are led away by error, fall from their own stedfastness. And that we may avoid being led away, we must seek to grow in all grace, in faith, and virtue, and knowledge. Labour to know Christ more clearly, and more fully; to know him so as to be more like him, and to love him better. This is the knowledge of Christ, which the apostle Paul reached after, and desired to attain; and those who taste this effect of the knowledge of the Lord and Saviour Jesus Christ, will, upon receiving such grace from him, give thanks and praise him, and join in ascribing glory to him now, in the full assurance of doing the same hereafter, for ever.