Context & Key Themes
John shifts from how believers ought to live to how believers ought to discern. Many false prophets have gone out into the world, and not every spirit is to be believed. The test John provides is doctrinal at its core but practical in its outworking: every spirit that confesses Jesus Christ has come in the flesh is from God, and every spirit that does not is not. From discernment John moves to one of the most concentrated passages in all of Scripture on the nature of God: God is love. Believers love because He first loved us, and that love casts out fear. The chapter closes with a hard, plain test for any claim of love for God: anyone who does not love his brother whom he has seen cannot love God whom he has not seen.
Key Verse
“There is no fear in love, but perfect love casts out fear.” — 1 John 4:18a
Summary
John urges believers not to believe every spirit but to test the spirits to see whether they are from God, because many false prophets have gone out into the world. The test is precise: every spirit that confesses Jesus Christ has come in the flesh is from God, and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which they have heard was coming and now is in the world already. But, John writes, his readers are from God and have overcome them, because He who is in them is greater than he who is in the world. The false prophets are from the world and speak from the world’s perspective, and the world listens to them; but believers are from God, and whoever knows God listens to those who teach the truth. By this they know the spirit of truth and the spirit of error.
Then John turns from discernment to the deepest source: love. Beloved, let us love one another, for love is from God, and whoever loves has been born of God and knows God. Anyone who does not love does not know God, because God is love. The love of God was made manifest among us in this: that God sent His only Son into the world so that we might live through Him. In this is love — not that we have loved God, but that He loved us and sent His Son to be the propitiation for our sins. Beloved, if God so loved us, we also ought to love one another. No one has ever seen God; but if we love one another, God abides in us, and His love is perfected in us.
By this we know that we abide in Him and He in us, because He has given us of His Spirit. And we have seen and testify that the Father has sent His Son to be the Savior of the world. Whoever confesses that Jesus is the Son of God, God abides in him, and he in God. So we have come to know and to believe the love that God has for us — God is love, and whoever abides in love abides in God, and God abides in him. By this is love perfected with us, so that we may have confidence for the day of judgment, because as He is, so also are we in this world.
There is no fear in love, John writes, but perfect love casts out fear. Fear has to do with punishment, and whoever fears has not been perfected in love. We love because He first loved us. And then John drives the test home one last time: if anyone says, “I love God,” and hates his brother, he is a liar; for the one who does not love his brother whom he has seen cannot love God whom he has not seen. The commandment they have from Him is this: whoever loves God must also love his brother.
Reflection
This chapter is both a sword and a blanket. The sword is the test that severs truth from counterfeit — a test the believer cannot afford to set aside in any age, but particularly not in one crowded with voices claiming to speak for God. The blanket is the announcement that God Himself is love, and that the love we are called to is not something we are commanded to manufacture but something we receive and then return. Perfect love casts out fear because it removes the question of punishment for those who abide in Christ. And the line about loving the brother whom we have seen is the one John keeps coming back to because it is unfakeable. The visible test reveals the invisible reality. Love what God loves, in the flesh, and the love of God is being perfected in you.