1 John: That You May Know

1 John 2:3–17

1 John 2:3–17 — Love Not the World; Keeping His Commands

Today’s Passage: 1 John 2:3–17

Yesterday closed with an advocate and an atoning sacrifice already in place, and today John turns to a direct test. Does a life actually show the marks of knowing God? Knowing, John says, is not a feeling you report to yourself; it is a word you keep. The command to love a brother is old and new at once, and after a brief pastoral pause John gives the sharper warning: loving the world’s whole way of valuing things cannot live in the same heart as loving the Father. Both movements serve one plain claim. A life that truly knows God is a life you can see.

As you read, hold this: Knowing God shows up as a kept word, not as a claimed feeling.

Context Tests, not a legal brief

John is not building a case toward a single courtroom verdict. He keeps handing the reader tests that can be held up against an actual life. Yesterday the test was light and confession; today it is a kept word, a loved brother, and a refused world. The method never changes, and it is a mercy, because it lets a person quietly check the claim of their heart against the walk of their feet. The two cannot be pulled apart.

1 John 2:3–6 (BSB)

³ By this we can be sure that we have come to know Him: if we keep His commandments. ⁴ If anyone says, “I know Him,” but does not keep His commandments, he is a liar, and the truth is not in him. ⁵ But if anyone keeps His word, the love of God has been truly perfected in him. By this we know that we are in Him: ⁶ Whoever claims to abide in Him must walk as Jesus walked.

Word study "Know" and "keep" — ginōskō / tēreō (1 John 2:3–5)

Greek: γινώσκω (ginōskō) and τηρέω (tēreō), pronounced ghin-OH-sko and tay-REH-oh. Strong’s G1097 / G5083.

John sets these two verbs side by side: “We know that we have come to know Him if we keep His commands” (v. 3). Keeping is not the price a person pays to know God, but the visible evidence that he does, the way warmth is evidence of a fire rather than the cause of it. Ginōskō is the same knowledge-by-experience named on Day 1, the knowing that comes of living close to a person and not merely of hearing about them. And tēreō means far more than obeying a rule from a distance; it means guarding and watching over something, the way a person guards what he holds truly worth keeping.

“Whoever claims to know Him but does not keep His commandments is a liar” (v. 4). It is blunt language, and it matches the letter’s whole method, for John will not let a claim about God stand on its own without asking the life to back it. Keeping His word, he says, is what “perfects” the love of God in a person (v. 5), bringing it to its intended completion. And to claim to abide in Him carries its own quiet obligation: to walk as Jesus walked (v. 6).

1 John 2:7–11 (BSB)

⁷ Beloved, I am not writing to you a new commandment, but an old one, which you have had from the beginning. This commandment is the message you have heard. ⁸ Then again, I am also writing to you a new commandment, which is true in Him and also in you. For the darkness is fading and the true light is already shining. ⁹ If anyone claims to be in the light but hates his brother, he is still in the darkness. ¹⁰ Whoever loves his brother remains in the light, and there is no cause of stumbling in him. ¹¹ But whoever hates his brother is in the darkness and walks in the darkness. He does not know where he is going, because the darkness has blinded his eyes.

The command to love is old. John’s readers already had it “from the beginning,” for it reaches back at least to the earliest apostolic teaching they received, and behind that to Leviticus 19:18. Yet the same command is also new, true in Christ and now true in them, because the darkness is fading and the true light is already shining. The content of it has not changed, but the measure has. It is no longer only love your neighbor as yourself; it is now love one another as He has loved you.

So whoever hates a brother is still in darkness, walks in darkness, and does not know where he is going, because the darkness has blinded his eyes (v. 11). In this letter light and love are never found apart. A reader cannot lay claim to the one while refusing the other.

1 John 2:12–14 (BSB)

¹² I am writing to you, little children, because your sins have been forgiven through His name. ¹³ I am writing to you, fathers, because you know Him who is from the beginning. I am writing to you, young men, because you have overcome the evil one. I have written to you, children, because you know the Father. ¹⁴ I have written to you, fathers, because you know Him who is from the beginning. I have written to you, young men, because you are strong, and the word of God abides in you, and you have overcome the evil one.

Here John takes a brief pastoral pause, turning to address little children, fathers, and young men, three stages of life gathered in the same congregation. To each he gives a reason for confidence that is already theirs: sins forgiven, a settled knowledge of Him who is from the beginning, and victory over the evil one. This is not a ladder to be climbed by effort. It is a warm description of what is already true of everyone who belongs to Him, spoken over them so they will not forget it.

1 John 2:15–17 (BSB)

¹⁵ Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him. ¹⁶ For all that is in the world—the desires of the flesh, the desires of the eyes, and the pride of life—is not from the Father but from the world. ¹⁷ The world is passing away, along with its desires; but whoever does the will of God remains forever.

“The kosmos, pronounced KOS-mos. Strong's G2889, world; world-order, world-system. John does not mean the physical creation that God made and loves, for his own Gospel uses this very word the other way when it says, “For God so loved the world” (John 3:16). Here kosmos names something else, the God-opposed order of things that organizes human life around itself and away from Him. Its three marks are named in the verse: the desires of the flesh, the desires of the eyes, and the pride of life. It is loving that system, and not the created world itself, that cannot live in the same heart as love for the Father. is passing away, along with its desires; but whoever does the will of God remains forever” (v. 17). There is that word menō once more, to remain, to abide, the same verb this passage has already used in verses 6, 10, and 14. A kept word stays, and the one who keeps it stays with it. The world’s desires do not; they are already on their way out.

Study notes Going deeper

The same author who wrote this letter gave us the fuller version of this old-and-new command, on the last night in the upper room, and set it down in his Gospel.

"A new commandment I give you: Love one another. As I have loved you, so you also must love one another. By this everyone will know that you are My disciples, if you love one another." John 13:34–35 (BSB)

What was old in its content becomes new in its measure. It is no longer simply love your neighbor as yourself; it is love one another as He has loved you. That is how knowing God shows itself in the end, in a kept word and a loved brother, and never merely in a claimed feeling.