Deuteronomy 18:21
New International Version
You may say to yourselves, “How can we know when a message has not been spoken by the LORD?”

New Living Translation
“But you may wonder, ‘How will we know whether or not a prophecy is from the LORD?’

English Standard Version
And if you say in your heart, ‘How may we know the word that the LORD has not spoken?’—

Berean Standard Bible
You may ask in your heart, “How can we recognize a message that the LORD has not spoken?”

King James Bible
And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?

New King James Version
And if you say in your heart, ‘How shall we know the word which the LORD has not spoken?’—

New American Standard Bible
And if you say in your heart, ‘How will we recognize the word which the LORD has not spoken?’

NASB 1995
“You may say in your heart, ‘How will we know the word which the LORD has not spoken?’

NASB 1977
“And you may say in your heart, ‘How shall we know the word which the LORD has not spoken?’

Legacy Standard Bible
Now you may say in your heart, ‘How will we know the word which Yahweh has not spoken?’

Amplified Bible
If you say in your heart, ‘How will we know and recognize the word which the LORD has not spoken?’

Christian Standard Bible
You may say to yourself, ‘How can we recognize a message the LORD has not spoken? ’

Holman Christian Standard Bible
You may say to yourself, ‘How can we recognize a message the LORD has not spoken?’

American Standard Version
And if thou say in thy heart, How shall we know the word which Jehovah hath not spoken?

Contemporary English Version
You may be asking yourselves, "How can we tell if a prophet's message really comes from the LORD?"

English Revised Version
And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?

GOD'S WORD® Translation
You may be wondering, "How can we recognize that the LORD didn't speak this message?"

Good News Translation
"You may wonder how you can tell when a prophet's message does not come from the LORD.

International Standard Version
Now you may ask yourselves, 'How will we be able to discern that the LORD has not spoken?'

NET Bible
Now if you say to yourselves, 'How can we tell that a message is not from the LORD?'--

New Heart English Bible
If you say in your heart, "How shall we know the word which the LORD has not spoken?"

Webster's Bible Translation
And if thou shalt say in thy heart, How shall we know the word which the LORD hath not spoken?
Majority Text Translations
Majority Standard Bible
You may ask in your heart, “How can we recognize a message that the LORD has not spoken?”

World English Bible
You may say in your heart, “How shall we know the word which Yahweh has not spoken?”
Literal Translations
Literal Standard Version
And when you say in your heart, How do we know the word which YHWH has not spoken?

Young's Literal Translation
'And when thou sayest in thy heart, How do we know the word which Jehovah hath not spoken? --

Smith's Literal Translation
And when thou shalt say in thy heart, How shall we know the word which Jehovah spake not?
Catholic Translations
Douay-Rheims Bible
And if in silent thought thou answer: How shall I know the word that the Lord hath not spoken?

Catholic Public Domain Version
But if, in silent thought, you respond: “How will I be able to recognize a word which the Lord has not spoken?”

New American Bible
Should you say to yourselves, “How can we recognize that a word is one the LORD has not spoken?”,

New Revised Standard Version
You may say to yourself, “How can we recognize a word that the LORD has not spoken?”
Translations from Aramaic
Lamsa Bible
And if you say in your heart, How shall we know the word which the LORD has not spoken?

Peshitta Holy Bible Translated
And if you say in your heart: ‘How shall I know the word that LORD JEHOVAH has not spoken?.’
OT Translations
JPS Tanakh 1917
And if thou say in thy heart: 'How shall we know the word which the LORD hath not spoken?'

Brenton Septuagint Translation
But if thou shalt say in thine heart, How shall we know the word which the Lord has not spoken?

Additional Translations ...
Audio Bible



Context
A New Prophet
20But if any prophet dares to speak a message in My name that I have not commanded him to speak, or to speak in the name of other gods, that prophet must be put to death.” 21 You may ask in your heart, “How can we recognize a message that the LORD has not spoken?” 22When a prophet speaks in the name of the LORD and the message does not come to pass or come true, that is a message the LORD has not spoken. The prophet has spoken presumptuously. Do not be afraid of him.…

Cross References
1 John 4:1
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.

Jeremiah 23:16
This is what the LORD of Hosts says: “Do not listen to the words of the prophets who prophesy to you. They are filling you with false hopes. They speak visions from their own minds, not from the mouth of the LORD.

Matthew 7:15-20
Beware of false prophets. They come to you in sheep’s clothing, but inwardly they are ravenous wolves. / By their fruit you will recognize them. Are grapes gathered from thornbushes, or figs from thistles? / Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. ...

1 Thessalonians 5:20-21
Do not treat prophecies with contempt, / but test all things. Hold fast to what is good.

Ezekiel 13:3
This is what the Lord GOD says: Woe to the foolish prophets who follow their own spirit yet have seen nothing.

2 Peter 2:1
Now there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the Master who bought them—bringing swift destruction on themselves.

1 Kings 22:22-23
And he replied, ‘I will go out and be a lying spirit in the mouths of all his prophets.’ ‘You will surely entice him and prevail,’ said the LORD. ‘Go and do it.’ / So you see, the LORD has put a lying spirit in the mouths of all these prophets of yours, and the LORD has pronounced disaster against you.”

Matthew 24:24
For false Christs and false prophets will appear and perform great signs and wonders to deceive even the elect, if that were possible.

Jeremiah 14:14
“The prophets are prophesying lies in My name,” replied the LORD. “I did not send them or appoint them or speak to them. They are prophesying to you a false vision, a worthless divination, the futility and delusion of their own minds.

1 Corinthians 14:29
Two or three prophets should speak, and the others should weigh carefully what is said.

Isaiah 8:20
To the law and to the testimony! If they do not speak according to this word, they have no light of dawn.

Acts 17:11
Now the Bereans were more noble-minded than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if these teachings were true.

Jeremiah 28:9
As for the prophet who prophesies peace, only if the word of the prophet comes true will the prophet be recognized as one the LORD has truly sent.”

2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, masquerading as apostles of Christ. / And no wonder, for Satan himself masquerades as an angel of light. / It is not surprising, then, if his servants masquerade as servants of righteousness. Their end will correspond to their actions.

Zechariah 13:2-3
And on that day, declares the LORD of Hosts, I will erase the names of the idols from the land, and they will no longer be remembered. I will also remove the prophets and the spirit of impurity from the land. / And if anyone still prophesies, his father and mother who bore him will say to him, ‘You shall not remain alive, because you have spoken falsely in the name of the LORD.’ When he prophesies, his father and mother who bore him will pierce him through.


Treasury of Scripture

And if you say in your heart, How shall we know the word which the LORD has not spoken?

1 Thessalonians 5:24
Faithful is he that calleth you, who also will do it.

1 John 4:1-3
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world…

Revelation 2:2
I know thy works, and thy labour, and thy patience, and how thou canst not bear them which are evil: and thou hast tried them which say they are apostles, and are not, and hast found them liars:

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Heart Hearts Message Word Yourselves
Deuteronomy 18
1. The LORD is the priests and Levites' inheritance
3. The priests' due
6. The Levites' portion
9. The abominations of the nations are to be avoided
15. Christ the Prophet is to be heard
20. The presumptuous prophet is to die














You may ask in your heart
This phrase suggests an internal reflection or concern among the Israelites. In the ancient Near Eastern context, the heart was considered the center of thought and decision-making, not just emotion. This reflects the importance of discernment in spiritual matters. The Israelites were encouraged to seek wisdom and understanding from God, as seen in Proverbs 3:5-6, which emphasizes trusting in the Lord with all one's heart.

“How can we recognize a message
The need for discernment is highlighted here. In a time when many claimed to speak for various gods, distinguishing a true message from God was crucial. This echoes the New Testament teaching in 1 John 4:1, which advises believers to test the spirits to see whether they are from God. The Israelites were given criteria to evaluate prophetic messages, emphasizing the importance of truth and alignment with God's revealed word.

that the LORD has not spoken?”
This phrase underscores the reality of false prophets and the danger they posed. In Deuteronomy 18:20, the penalty for false prophecy was death, indicating the seriousness of speaking presumptuously in God's name. The true test of a prophet, as outlined in Deuteronomy 18:22, was whether their predictions came to pass. This points to the ultimate fulfillment of prophecy in Jesus Christ, who perfectly fulfilled the prophecies concerning the Messiah, as seen in passages like Isaiah 53 and Psalm 22.

Persons / Places / Events
1. Moses
The author of Deuteronomy, Moses is delivering God's laws and instructions to the Israelites before they enter the Promised Land.

2. Israelites
The chosen people of God, who are receiving guidance on how to discern true prophecy from false prophecy.

3. Prophets
Individuals who claim to speak on behalf of God. This verse addresses the need to discern true prophets from false ones.

4. Promised Land
The land of Canaan, which the Israelites are about to enter. This context is crucial as they will encounter various cultures and religious practices.

5. False Prophecy
The event or situation where a message is claimed to be from God but is not. This verse provides guidance on how to identify such messages.
Teaching Points
Discernment is Essential
Believers must cultivate a discerning heart to recognize messages that are truly from God. This involves prayer, study of Scripture, and seeking the guidance of the Holy Spirit.

Testing Prophecies
Just as the Israelites were instructed, Christians today should test prophecies and teachings against the truth of Scripture. If a message contradicts God's Word, it is not from Him.

The Role of the Holy Spirit
The Holy Spirit plays a crucial role in helping believers discern truth from falsehood. Relying on the Spirit's guidance is vital in navigating spiritual teachings.

Accountability in Community
Engaging with a community of believers provides accountability and collective wisdom in discerning true messages from God.

Guarding Against Deception
In a world with many voices claiming divine authority, believers must be vigilant and guard their hearts against deception by staying rooted in biblical truth.
Bible Study Questions and Answers
1. What is the meaning of Deuteronomy 18:21?

2. How can we discern a true prophet according to Deuteronomy 18:21?

3. What role does prayer play in understanding God's messages today?

4. How does Deuteronomy 18:21 connect with 1 John 4:1 about testing spirits?

5. Why is it important to verify teachings against Scripture in today's world?

6. How can we apply Deuteronomy 18:21 when evaluating modern-day prophecies?

7. How can we discern a true prophet according to Deuteronomy 18:21?

8. What criteria does Deuteronomy 18:21 provide for identifying false prophets?

9. How does Deuteronomy 18:21 challenge modern claims of prophecy?

10. What are the top 10 Lessons from Deuteronomy 18?

11. What does the Bible say about false prophecies?

12. How can you purify your hearts, double-minded ones?

13. If Ezekiel 13:10 condemns prophets who proclaim “Peace” when there is none, how do we verify which prophet is truly speaking on behalf of God?

14. What defines a prophetic ministry?
What Does Deuteronomy 18:21 Mean
You may ask

God anticipates honest inquiry. He welcomes questions that spring from a desire to obey rather than to doubt His authority. • 1 Kings 3:9 shows Solomon’s request for discernment, proving that God honors such petitions. • James 1:5 encourages believers to “ask God, who gives generously,” affirming that seeking wisdom aligns with His will. • Psalm 25:4-5 models a heart that asks, “Show me Your ways… teach me Your paths,” illustrating that humble questions are part of faithful living.


in your heart

This is a private, sincere search for truth, not a public challenge. • 1 Samuel 16:7 reminds us that “man sees the outward appearance, but the LORD sees the heart,” indicating that God values inner motives. • Psalm 139:23-24 petitions, “Search me, O God… test me,” revealing that inner dialogue matters to Him. • Proverbs 4:23 instructs, “Guard your heart,” because all discernment flows from within where God looks first.


“How can we recognize

The verse assumes that distinguishing genuine revelation is possible and necessary. • Hebrews 5:14 says mature believers “have their senses trained to distinguish between good and evil,” showing that recognition grows with practice. • 1 John 4:1 commands, “Test the spirits to see whether they are from God,” establishing a clear biblical mandate to evaluate messages. • Acts 17:11 commends the Bereans for examining “the Scriptures daily,” presenting Scripture itself as the primary benchmark.


a message

Prophetic words claim divine origin and therefore carry life-shaping authority. • 2 Peter 1:21 explains that true prophecy “never had its origin in the will of man, but men spoke from God,” setting a standard. • Hebrews 1:1 notes that God “spoke to our fathers through the prophets,” confirming that authentic messages exist and are identifiable. • Revelation 22:18-19 warns against adding to or taking from His words, underscoring the gravity of any claimed message from God.


that the LORD has not spoken?”

The danger of counterfeit prophecy is real; God equips His people to spot it. • Deuteronomy 18:22 answers directly: when a prophecy does not come to pass, “that is a word the LORD has not spoken.” • Jeremiah 23:16 cautions, “Do not listen to the words of the prophets who prophesy to you… they speak visions from their own minds.” • Matthew 7:15 depicts false prophets as “wolves in sheep’s clothing,” so vigilance is essential. Practical markers include:

– Unfulfilled predictions (Deuteronomy 18:22)

– Teaching that contradicts Scripture (Galatians 1:8)

– Fruit that denies Christlike character (Matthew 7:16-20)


summary

Deuteronomy 18:21 legitimizes the believer’s heartfelt question about discerning God’s voice. Scripture affirms that: God welcomes sincere inquiry, evaluates our inner motives, provides tools for recognition, and warns against messages He never spoke. By filtering every prophetic claim through fulfilled accuracy, doctrinal consistency, and observable fruit—always anchored in the written Word—we can confidently separate divine revelation from human or deceptive imitation.

Verses 21, 22. - The test by which it was to be discovered which was the true prophet and which the false, was the fulfillment or non-fulfillment of his prediction. The reference here is to the prediction of proximate events - events that were to happen within a limited period, but which were not such as one not divinely instructed could foresee. When such came to pass, the pretensions of the prophet were thereby substantiated, and his authority established (cf. 1 Samuel 3:19; John 2:18, etc.). This was a more certain test than such as was offered by signs and wonders (Deuteronomy 13:2, etc.).



Parallel Commentaries ...


Hebrew
You may ask
תֹאמַ֖ר (ṯō·mar)
Verb - Qal - Imperfect - second person masculine singular
Strong's 559: To utter, say

in your heart,
בִּלְבָבֶ֑ךָ (bil·ḇā·ḇe·ḵā)
Preposition-b | Noun - masculine singular construct | second person masculine singular
Strong's 3824: Inner man, mind, will, heart

“How
אֵיכָה֙ (’ê·ḵāh)
Interjection
Strong's 349: How?, how!, where

can we recognize
נֵדַ֣ע (nê·ḏa‘)
Verb - Qal - Imperfect - first person common plural
Strong's 3045: To know

a message
הַדָּבָ֔ר (had·dā·ḇār)
Article | Noun - masculine singular
Strong's 1697: A word, a matter, thing, a cause

that
אֲשֶׁ֥ר (’ă·šer)
Pronoun - relative
Strong's 834: Who, which, what, that, when, where, how, because, in order that

the LORD
יְהוָֽה׃ (Yah·weh)
Noun - proper - masculine singular
Strong's 3068: LORD -- the proper name of the God of Israel

has not
לֹא־ (lō-)
Adverb - Negative particle
Strong's 3808: Not, no

spoken?”
דִבְּר֖וֹ (ḏib·bə·rōw)
Verb - Piel - Perfect - third person masculine singular | third person masculine singular
Strong's 1696: To arrange, to speak, to subdue


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OT Law: Deuteronomy 18:21 If you say in your heart How (Deut. De Du)
Deuteronomy 18:20
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