Verses 3-4: By this we know that we have come to know Him, if we keep His commandments. The one who says, “I have come to know Him,” and does not keep His commandments, is a liar, and the truth is not in him.
The opening phrase ‘by this’ refers to John’s statement: “if we keep His commandments.” He is not referring specifically to the Ten Commandments, but divine directives, “the precepts given to Christians, Christian doctrines and duties.”1 The word ‘if’ again is the determining factor of whether or not we decide to keep His commandments. If we decide to, there will be a positive outcome; if we choose not to keep His commandments, we lose out of the special benefits of our relationship with God.
Next, John says that by keeping His commandments we realize that special benefit—“that we have come to know Him.” The grammar of the Greek is very precise in emphasizing our present status of having arrived at an intimate knowledge of Him. The fact of having come to know Him is described as completed with further development of a continued and ever-growing knowledge.2 Dr. Merrill Tenney illustrates the significance of knowing God.
For the complete fulfillment of our being, we must know God. This, said Jesus, constitutes eternal life.3 Not only is it endless, since the knowledge of God would require an eternity to develop fully, but qualitatively it must exist in an eternal dimension.4
Kenneth Wuest asserts that this is an experiential knowledge “in contrast with and opposed to a mere theoretical knowledge of His Person.”5 And Dr. L.S. Chafer explains the means by which the believer is able to know God:
Fallen man is incapable, apart from divine illumination, of comprehending the sovereign Creator…the saved receive such knowledge of God as they experience, only through the illuminating work of the Holy Spirit.6
But what does it mean to keep His commandments? The word ‘keep’ means to observe, fulfill, pay attention to.7 And the right response of the believer to His commandments is to observe them, not to merely examine or scrutinize them, but to obey them and to follow the instructions given.
His Commandments
What are His commandments? Kenneth Wuest explains that “The precepts (commandments) are those given by our Lord either personally while on earth or through His apostles in the New Testament Books.”8 This means that they are numerous and must be discovered through a careful and thorough study of Scripture.
Note a few example commands from various writers of Scripture:
And He said to them, “Follow Me, and I will make you fishers of men.” (Matthew 4:19; cf. Matthew 28:19–20; Luke 5:27)
“A new commandment I give to you, that you love one another, even as I have loved you, that you also love one another.” (John 13:34; cf. Romans 12:9–10)
But I say, walk by the Spirit, and you will not carry out the desire of the flesh. (Galatians 5:16)
And do not get drunk with wine, for that is dissipation, but be filled with the Spirit, (Ephesians 5:18)
Do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption. (Ephesians 4:30)
Submit therefore to God. Resist the devil and he will flee from you. Draw near to God and He will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded.” (James 4:6–8)
You younger men, likewise, be subject to your elders; and all of you, clothe yourselves with humility toward one another, for God is opposed to the proud, but gives grace to the humble. Therefore humble yourselves under the mighty hand of God, that He may exalt you at the proper time (1 Peter 5:5–6)
Now Who is the Liar?
In verse 4, John maintains that the one who claims that they have come to know God and consistently fails to keep His commandments is unequivocally a liar. A liar is someone who knowingly fabricates falsehoods, tells stories or purposely misrepresents facts. Which puts them in the same company with the devil (John 8:44) and the Cretans (Titus 1:12), friends in low places.
And not only is liar their absolute status, but they are utterly devoid of the truth. In the Greek grammar, the presence of the article is used to emphasize the identity9 of the noun it modifies. So, what is the truth? The answer was provided by Jesus Christ:
“Sanctify them in the truth; Your word is truth.” (John 17:17)
This quote by Our Lord contains two points of Biblical doctrine. The first is that God’s Word, Scripture, is truth. It is absolute truth because it originates from the God of the universe. And the second is that it has a specific purpose for believers: to sanctify them. The word ‘sanctify’ means “to set apart for God and His holy purposes.”10 And that is what His truth is designed to do with believers—to set them apart from their former manner of life (Ephesians 4:22) to become imitators of God (Ephesians 5:1-2) and that their practice of the truth will be evidenced by all (1 John 1:6).
Otherwise, as Dr. Walvoord proclaims of the liar, that "In such a person the truth is not a dynamic, controlling influence. He is seriously out of touch with spiritual reality."11
Are we consistently keeping His commandments? Do we demonstrate a practice of His truth? We must prove ourselves daily that we are faithful believers—that we are in the faith (2 Corinthians 13:5).
[1] Zodhiates, S. (2000). In The Complete Word Study Dictionary: New Testament. Chattanooga, TN: AMG Publishers, G1785.
[2] Braune, Karl (1867). In Lange’s Commentary on the Holy Scriptures, New York, NY: Charles Scribner, 9.49.
[3] John 17:3 - “This is eternal life, that they may know You.”
[4] Tenney, Merrill (1979). John, In The Expositor’s Bible Commentary (Gaebelein, Frank E., Gen. Ed.), Grand Rapids, MI: Zondervan Publishing House, 9.162.
[5] Wuest, K. S. (1997). Wuest’s Word Studies from the Greek New Testament: for the English Reader. Grand Rapids: Eerdmans. 13.113.
[6] Chafer, Lewis Sperry (1976). Systematic Theology, Dallas, TX: Dallas Seminary Press, 1.179.
[7] Arndt, W., Gingrich, F. W., Danker, F. W., & Bauer, W. (1979). In A Greek-English Lexicon of the New Testament and other Early Christian Literature. Chicago: University of Chicago Press, p. 815.
[8] Wuest, 13.113.
[9] Dana, H.E. & Mantey, Julius R. (1957). A Manual Grammar of the Greek New Testament, Toronto, Ontario: Macmillan Co., p. 140.
[10] Ryrie, C. C. (1995). Ryrie Study Bible: New American Standard Bible, 1995 update. Chicago: Moody Press, p. 1714 note.
© 2024 David M. Rossi