2 Peter 1:8
 2 Peter 1:8 
New International Version (©2011)
For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ.

New Living Translation (©2007)
The more you grow like this, the more productive and useful you will be in your knowledge of our Lord Jesus Christ.

English Standard Version (©2001)
For if these qualities are yours and are increasing, they keep you from being ineffective or unfruitful in the knowledge of our Lord Jesus Christ.

New American Standard Bible (©1995)
For if these qualities are yours and are increasing, they render you neither useless nor unfruitful in the true knowledge of our Lord Jesus Christ.

King James Bible (Cambridge Ed.)
For if these things be in you, and abound, they make you that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ.

Holman Christian Standard Bible (©2009)
For if these qualities are yours and are increasing, they will keep you from being useless or unfruitful in the knowledge of our Lord Jesus Christ.

International Standard Version (©2012)
For if you possess these qualities, and if they continue to increase among you, they will keep you from being ineffective and unproductive in attaining a full knowledge of our Lord Jesus, the Messiah.

NET Bible (©2006)
For if these things are really yours and are continually increasing, they will keep you from becoming ineffective and unproductive in your pursuit of knowing our Lord Jesus Christ more intimately.

Aramaic Bible in Plain English (©2010)
For when these things are found in you and abound, they prove you are not lazy nor fruitless in the teaching of our Lord Yeshua The Messiah.

GOD'S WORD® Translation (©1995)
If you have these qualities and they are increasing, it demonstrates that your knowledge about our Lord Jesus Christ is living and productive.

King James 2000 Bible (©2003)
For if these things be in you, and abound, they make you that you shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ.

American King James Version
For if these things be in you, and abound, they make you that you shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ.

American Standard Version
For if these things are yours and abound, they make you to be not idle nor unfruitful unto the knowledge of our Lord Jesus Christ.

Douay-Rheims Bible
For if these things be with you and abound, they will make you to be neither empty nor unfruitful in the knowledge of our Lord Jesus Christ.

Darby Bible Translation
for these things existing and abounding in you make you to be neither idle nor unfruitful as regards the knowledge of our Lord Jesus Christ;

English Revised Version
For if these things are yours and abound, they make you to be not idle nor unfruitful unto the knowledge of our Lord Jesus Christ.

Webster's Bible Translation
For if these things be in you, and abound, they make you that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ.

Weymouth New Testament
If these things exist in you, and continually increase, they prevent your being either idle or unfruitful in advancing towards a full knowledge of our Lord Jesus Christ.

World English Bible
For if these things are yours and abound, they make you to be not idle nor unfruitful to the knowledge of our Lord Jesus Christ.

Young's Literal Translation
for these things being to you and abounding, do make you neither inert nor unfruitful in regard to the acknowledging of our Lord Jesus Christ,

Matthew Henry's Concise Commentary

1:1-11 Faith unites the weak believer to Christ, as really as it does the strong one, and purifies the heart of one as truly as of another; and every sincere believer is by his faith justified in the sight of God. Faith worketh godliness, and produces effects which no other grace in the soul can do. In Christ all fulness dwells, and pardon, peace, grace, and knowledge, and new principles, are thus given through the Holy Spirit. The promises to those who are partakers of a Divine nature, will cause us to inquire whether we are really renewed in the spirit of our minds; let us turn all these promises into prayers for the transforming and purifying grace of the Holy Spirit. The believer must add knowledge to his virtue, increasing acquaintance with the whole truth and will of God. We must add temperance to knowledge; moderation about worldly things; and add to temperance, patience, or cheerful submission to the will of God. Tribulation worketh patience, whereby we bear all calamities and crosses with silence and submission. To patience we must add godliness: this includes the holy affections and dispositions found in the true worshipper of God; with tender affection to all fellow Christians, who are children of the same Father, servants of the same Master, members of the same family, travellers to the same country, heirs of the same inheritance. Wherefore let Christians labour to attain assurance of their calling, and of their election, by believing and well-doing; and thus carefully to endeavour, is a firm argument of the grace and mercy of God, upholding them so that they shall not utterly fall. Those who are diligent in the work of religion, shall have a triumphant entrance into that everlasting kingdom where Christ reigns, and they shall reign with him for ever and ever; and it is in the practice of every good work that we are to expect entrance to heaven.


Pulpit Commentary

Verse 8. - For if these things be in you, and abound; literally, for these things belonging to you and abounding make, etc. The word used here (ὑπάρχοντα) implies actual possession; these graces must be made our own; they must be wrought into our characters: then they will increase and multiply, for the grace of God cannot lie still, it must ever he advancing from glory to glory. They make you that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ; literally, they make you not idle nor yet unfruitful towards the full knowledge. The Greek word for "knowledge" is ἐπίγνωσις (on which see verse 2, and note there). Here we know only in part, we see through a glass darkly; but that imperfect knowledge should be ever growing, increasing in fullness and distinctness (see chapter 2 Peter 3:18). The various graces of the Christian character, realized in the heart, will lead us on towards that fuller knowledge of Christ; if they are really ours, they will not allow us to be idle, they must bring forth the fruit of good works; and the life of righteousness by faith draws the Christian onwards in the knowledge of Christ: we learn to knew him by following him (comp. Philippians 3:9, 10; Colossians 1:10).


Gill's Exposition of the Entire Bible

For if these things be in you,.... Are wrought in you by the Spirit of God, and exercised and performed by his assistance, who works in his people both to will and do:

and abound; increase in their acts and exercises by the frequent performance of them: they make you; both by way of influence and evidence,

that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ. There is a knowledge of Christ which is barren and fruitless; and those that have it are so in their conversations, and it will be of no avail to them another day: and this is a mere notional and speculative knowledge, such as is not attended with any inward experience and application of Christ to themselves, or any fruits of righteousness in their lives, and is a bare theory of things relating to his person, offices, and works; but there is a knowledge of him that is spiritual and experimental, by which a soul not only approves of Christ, but places its trust and confidence in him, and appropriates him to himself, and practically observes his commands and ordinances in the faith of him; and in love to him he performs the above duties, and exercises the above graces; from whence it appears, that he is neither barren nor unfruitful himself in the profession of his knowledge of Christ; "or in the acknowledgment of him", as it may be rendered; nor is that a vain, empty, and useless thing: he is not like the barren fig tree, or the earth that bears briers and thorns, and is nigh to cursing and burning, but like a tree planted by a river of water, and is green, flourishing, and fruitful. This is used as an argument to enforce the foregoing exhortation, to add to, that is, to exercise and perform the above graces and duties, in conjunction with each other.


Jamieson-Fausset-Brown Bible Commentary

8. be—Greek, "subsist" that is, supposing these things to have an actual subsistence in you; "be" would express the mere matter-of-fact being (Ac 16:20).

abound—more than in others; so the Greek.

make—"render," "constitute you," habitually, by the very fact of possessing these graces.

barren—"inactive," and, as a field lying fallow and unworked (Greek), so barren and useless.

unfruitful in—rather, … in respect to, "The full knowledge (Greek) of Christ" is the goal towards which all these graces tend. As their subsisting in us constitutes us not barren or idle, so their abounding in us constitutes us not unfruitful in respect to it. It is through doing His will, and so becoming like Him, that we grow in knowing Him (Joh 7:17).


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Make Your Calling Sure
7And to godliness brotherly kindness; and to brotherly kindness charity. 8For if these things be in you, and abound, they make you that you shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ. 9But he that lacks these things is blind, and cannot see afar off, and has forgotten that he was purged from his old sins. …

John 17:3 Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.
Philippians 3:8 What is more, I consider everything a loss because of the surpassing worth of knowing Christ Jesus my Lord, for whose sake I have lost all things. I consider them garbage, that I may gain Christ
Colossians 1:10 so that you may live a life worthy of the Lord and please him in every way: bearing fruit in every good work, growing in the knowledge of God,
2 Peter 1:2 Grace and peace be yours in abundance through the knowledge of God and of Jesus our Lord.
2 Peter 1:3 His divine power has given us everything we need for a godly life through our knowledge of him who called us by his own glory and goodness.
2 Peter 2:20 If they have escaped the corruption of the world by knowing our Lord and Savior Jesus Christ and are again entangled in it and are overcome, they are worse off at the end than they were at the beginning.
2 Peter 3:18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be glory both now and forever! Amen.