Lesson 15: Test the Spirits

1 John 4:1-6 · The Doctrinal Test Expanded

John has been building a cumulative case for assurance. In chapter 3, he walked through the moral test (practicing righteousness) and the love test (loving the brethren). Now he returns to the doctrinal test — not merely as a one-time confession but as an ongoing discernment. The church is surrounded by false teachers who claim to speak for God. How do you tell the difference between the Spirit of truth and the spirit of error? John gives three tests: the Word, the Son, and the Spirit.

Read the Text

¹Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world. ²By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God, ³and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already. ⁴Little children, you are from God and have overcome them, for he who is in you is greater than he who is in the world. ⁵They are from the world; therefore they speak from the world, and the world listens to them. ⁶We are from God. Whoever knows God listens to us; whoever is not from God does not listen to us. By this we know the Spirit of truth and the spirit of error.
— 1 John 4:1-6 (ESV)

Believe Not Every Spirit

Verse 1 opens with a surprising command: "Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world."

John calls them "beloved" — his dear children in the faith — and then gives what sounds almost like a warning against faith itself. But he is making a crucial distinction. Saving faith is not gullibility. The same God who says "believe on the Lord Jesus Christ" also says "believe not every spirit." Faith is no better than its object. To believe a lie in the name of openness is not humility — it is danger.

The word for "test" is dokimazō — to examine, to prove, to approve after testing. It is the same word used of testing metals to determine whether they are genuine. John is saying: do not assume that every spiritual-sounding message is from God. Put it to the test. The faith that cannot be tested cannot be trusted.

Why Test the Spirits?Behind every prophet there is a spirit — either the Spirit of God or the spirit of Satan. False teachers do not usually deny God outright; they misrepresent Him. Satan's method is not denial but substitution — an antichrist (anti = against, but also instead of). He does not abolish religion; he corrupts it. Every cult, every false teaching, begins with a wrong thought about Christ. As Adrian Rogers said: "The devil had rather get you to believe a wrong thing than to do a wrong thing — because the thought is the father of the deed."

Test by the Son of God

Verses 2-3 give the primary doctrinal test: "Every spirit that confesses that 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 heart of the doctrinal test. John is not asking whether someone uses the name "Jesus." Anyone can say that name. The test is whether they confess that Jesus Christ has come in the flesh — that the eternal Son of God truly became man, fully God and fully man, in one Person.

The two names together are essential:

Jesus — His humanity. The name given at His birth, identifying Him as a real man who lived, suffered, and died.
Christ — His deity. The Anointed One, the Son of God, the promised Messiah.

To deny either is to fall into the spirit of antichrist. Those who deny the full humanity of Jesus (the heretics John was confronting, precursors to Gnosticism and Docetism) make the cross meaningless — a phantom cannot die for sins. Those who deny His full deity make the cross powerless — a mere man cannot save. The true Christ is both: as much God as if He were not man, as much man as if He were not God.

The Spirit of AntichristJohn says this spirit "is in the world already." Not merely a future figure but a present reality — a spirit that denies the incarnation. Any teaching that diminishes who Jesus is — whether it denies His deity, His humanity, or the union of both in one Person — is the spirit of antichrist. This is not about minor doctrinal differences among believers but about the fundamental identity of Jesus Christ.

Test by the Word of God

Verse 6 gives a second test: "We are from God. Whoever knows God listens to us; whoever is not from God does not listen to us."

When John says "us," he means the apostles — the eyewitnesses who wrote the New Testament. The test is simple: does a teacher submit to the apostolic writings? Do they accept the authority of Scripture? Those who know God recognize the voice of God in His Word. The sheep know the Shepherd's voice (John 10:4-5). Those who reject or twist the Scriptures reveal that they are not of God.

This test is remarkably practical. When someone claims to speak for God, ask: do their teachings align with what God has already said in His Word? A true prophet will not contradict the Bible. A false prophet will twist it, ignore it, or add to it.

Test by the Spirit of God

Verses 4-5 give the third test: "Little children, you are from God and have overcome them, for he who is in you is greater than he who is in the world."

Beyond the external tests of Scripture and doctrine, there is an internal witness. The Holy Spirit who lives in every believer enables us to discern truth from error. Not by special revelation or secret knowledge — but by the Spirit's illumination of the Word and His witness to the Son.

This is the threefold cord that cannot be broken: the Word of God (the objective standard), the Son of God (the content of the faith), and the Spirit of God (the internal Teacher). The Spirit never contradicts the Word, and He always points to the Son. When all three agree, we can be confident we have the truth.

ReflectionAdrian Rogers illustrated this with a radio: "There are two signals coming out in the world: the AM — that's the antichrist message; the FM — that's the Father's message. And they are being broadcast all the time." You have to choose which frequency you are tuned to. The threefold cord — Word, Son, Spirit — is your tuner. When you know the Shepherd's voice, you will not follow a stranger.

Greater Is He Who Is in You

Verse 4 ends with a triumphant declaration: "He who is in you is greater than he who is in the world." This is not a command to overcome but an announcement that we have overcome — because the One who lives in us has already won the victory. The Spirit of God indwelling every believer is greater than the spirit of antichrist at work in the world. The battle is not in doubt. The stronger One has already bound the strong man (Mark 3:27). We do not fight for victory but from victory.

This verse is the believer's confidence in the face of every false teaching, every deceptive spirit, every attack on the identity of Christ. The victory is not in our cleverness but in Christ's conquest. Because He is who He is — the Son of God come in the flesh — we who are in Him have nothing to fear.

Key Terms to Remember

Test (dokimazō) — To examine, prove, approve after testing. Used of testing metals for genuineness. Believers are to test every spirit, not naively accept every spiritual claim.
False prophet (pseudoprophētēs) — One who speaks falsely in God's name. Not merely mistaken but deliberately misleading. Many had "gone out into the world" — actively spreading error.
Spirit of truth / spirit of error — The two spiritual sources behind all teaching. Every message originates either from the Spirit of God (the Spirit of truth) or from the spirit of the devil (the spirit of error). There is no neutral ground.
Confess (homologeō) — To say the same thing. Confessing Jesus Christ come in the flesh means agreeing with God's revelation about who Jesus is — fully God and fully man in one Person.
Overcome (nikaō) — To conquer, prevail, gain the victory. Used in the perfect tense: "you have overcome" — a past victory with continuing results. The believer's victory over the spirit of antichrist is already accomplished in Christ.

Check Your Understanding

1. Why does John tell believers to "test the spirits" instead of simply believing everything spiritual?

a) Because all spiritual experiences are dangerous

b) Because many false prophets have gone out into the world

c) Because the Holy Spirit no longer speaks today

d) Because believers are not supposed to have faith

b) Because many false prophets have gone out into the world. John does not oppose faith — he opposes misplaced faith. Behind every prophet is a spirit, and not every spirit is from God. The presence of false teachers in the world makes discernment essential. Faith is no better than its object; believing the wrong thing in God's name is spiritual danger, not spiritual openness.

2. What is the central doctrinal test John gives in verses 2-3?

Whether a spirit confesses that Jesus Christ has come in the flesh. This is the incarnation test: do they affirm that Jesus is fully man (His humanity) and Christ is fully God (His deity), united in one Person? Denying either the full humanity or the full deity of Jesus is the spirit of antichrist. As Rogers said, "There is no way that you can be right with God and wrong about Jesus."

3. John gives three tests for discerning truth from error in this passage. What are they?

(1) The Word of God — those who know God listen to apostolic Scripture (v. 6); (2) The Son of God — the confession that Jesus Christ has come in the flesh (vv. 2-3); (3) The Spirit of God — the internal witness of the indwelling Holy Spirit who enables discernment (v. 4). These three form a threefold cord: the objective standard (Word), the content of faith (Son), and the internal Teacher (Spirit).

4. On what basis does John say believers "have overcome" the false prophets?

Because "He who is in you is greater than he who is in the world" (v. 4). The victory is not in our intellectual ability to detect falsehood but in the indwelling Christ who has already conquered. The Spirit of God in the believer is greater than the spirit of antichrist in the world. We do not fight for victory but from victory. The battle is not in doubt because the stronger One has already won.

Primary Resource

Read: Adrian Rogers, "Testing the Prophets" — the sermon covering 1 John 4:1-6. Rogers gives five introductory tests (method, motive, morals, ministry, message) and then focuses on the three great tests: by the Word, by the Son, and by the Spirit.

Read: 1 John 4:1-6 in at least two translations (e.g., ESV and NIV or KJV). Notice how "test the spirits" and "spirit of truth and spirit of error" are translated. Compare how the KJV renders "try the spirits" versus "test the spirits."

Before Next Lesson

Read 1 John 4:7-11. Ask: What does it mean that "God is love" — and how did He demonstrate that love?

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