Exploring the Meaning of Pseudomai in Greek

ψεύδομαι means “to lie,” a verb used for false speech and false claims in a range of settings: public slander, deliberate deception before God, and denials that the speaker is lying. It appears in teachings of Jesus, narrative confrontation in Acts, apostolic self-attestation, ethical instruction, and prophetic rebuke.

Occurrences

“Blessed are you when people reproach you, persecute you, and say all kinds of evil against you falsely, for my sake.” (Matthew 5:11)

Here the verb describes hostile speech directed “against you,” tied to reproach and persecution. The lie is not merely incorrect information; it is “all kinds of evil” spoken “falsely” in a context of opposition “for my sake,” so the falsehood functions as a weapon of persecution.

But Peter said, “Ananias, why has Satan filled your heart to lie to the Holy Spirit and to keep back part of the price of the land?” (Acts 5:3)

The lie is aimed “to the Holy Spirit,” placing deception in a spiritual and moral register. The wording links the lie with a concrete act—“to keep back part of the price”—so the falsehood serves to conceal a withheld portion and to present the act as something other than it is.

While you kept it, didn’t it remain your own? After it was sold, wasn’t it in your power? How is it that you have conceived this thing in your heart? You haven’t lied to men, but to God.” (Acts 5:4)

This scene presses the personal responsibility behind the act: the wrongdoing is “conceived…in your heart.” The lie is explicitly relocated from human victims (“men”) to its ultimate target (“God”), sharpening the seriousness of deception by naming the one chiefly addressed by the falsehood.

I tell the truth in Christ. I am not lying, my conscience testifying with me in the Holy Spirit (Romans 9:1)

Here the verb is negated—“I am not lying”—as part of a solemn claim of honesty. Truth-telling is framed “in Christ,” and the denial of lying is reinforced by inward and spiritual witness: “my conscience testifying with me in the Holy Spirit.” The lie is the opposite of what the speaker insists upon under sacred reference.

The God and Father of the Lord Jesus Christ, he who is blessed forever more, knows that I don’t lie. (2 Corinthians 11:31)

The denial “I don’t lie” is set under the knowledge of “The God and Father of the Lord Jesus Christ.” The verb marks the kind of speech the speaker disavows, and the appeal to God’s knowledge intensifies the claim: what is said is presented as accountable before the One who “knows.”

Now about the things which I write to you, behold, before God, I’m not lying. (Galatians 1:20)

The lie here would concern “the things which I write to you,” so ψεύδομαι relates directly to the reliability of written communication. “Before God” positions the denial as an oath-like assurance: the statement’s credibility is anchored in divine audience and scrutiny.

Don’t lie to one another, seeing that you have put off the old man with his doings, (Colossians 3:9)

This is a straightforward communal prohibition: “Don’t lie to one another.” The command is grounded in an identity change—“you have put off the old man with his doings”—so lying is treated as a practice belonging to an older pattern of life that no longer fits the community’s new way.

to which I was appointed a preacher and an apostle—I am telling the truth in Christ, not lying—a teacher of the Gentiles in faith and truth. (1 Timothy 2:7)

Again the verb is negated (“not lying”) within a self-description of calling and role. The speaker’s appointment “a preacher and an apostle” and “a teacher of the Gentiles” is framed by “I am telling the truth in Christ,” so the denial of lying functions to validate the legitimacy and sincerity of the stated vocation.

that by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to take hold of the hope set before us. (Hebrews 6:18)

The verb is used to state a divine impossibility: “it is impossible for God to lie.” The point is not merely ethical; it is pastoral and stabilizing—this impossibility supports “strong encouragement” and undergirds those who “have fled for refuge” to grasp “the hope set before us.” God’s non-lying secures hope.

But if you have bitter jealousy and selfish ambition in your heart, don’t boast and don’t lie against the truth. (James 3:14)

Lying is connected to inner disorders—“bitter jealousy and selfish ambition in your heart.” The instruction pairs “don’t boast” with “don’t lie against the truth,” presenting lying as an active opposition to truth, not merely a private fib. It is speech that contradicts truth in a way shaped by corrupt motives.

If we say that we have fellowship with him and walk in the darkness, we lie, and don’t tell the truth. (1 John 1:6)

The lie here is a contradiction between claim and conduct: saying “we have fellowship with him” while “walk[ing] in the darkness.” ψεύδομαι diagnoses the falsehood as living inconsistency, and it is immediately paired with another description—“don’t tell the truth”—showing the lie as a failure of truthful speech that matches reality.

Behold, I give some of the synagogue of Satan, of those who say they are Jews, and they are not, but lie—behold, I will make them to come and worship before your feet, and to know that I have loved you. (Revelation 3:9)

Here lying is bound to false identity claims: “those who say they are Jews, and they are not, but lie.” The lie is a public assertion about who they are. The verse sets this deceptive claim within a conflict scene, where exposure and reversal follow: they will “know that I have loved you,” implying that the lying claim will be shown as false in the outcome described.

Sense and Usage

Across these passages, ψεύδομαι consistently names the act of lying as a moral and relational breach—speech (or claimed identity) that does not correspond to reality and is directed toward an audience. That audience can be other people (“to one another,” Colossians 3:9; “against you,” Matthew 5:11), the truth itself (“lie against the truth,” James 3:14), or God (“to the Holy Spirit,” Acts 5:3; “to God,” Acts 5:4; “before God,” Galatians 1:20). The verb therefore regularly carries an implied accountability: lies are spoken to someone, and the texts frequently heighten the seriousness by naming the ultimate hearer.

Several occurrences use the negated form (“I am not lying,” “I don’t lie,” “not lying”), making the verb a tool for solemn self-attestation. In Romans 9:1 the denial is reinforced by “my conscience” and “the Holy Spirit,” presenting the claim as internally and spiritually witnessed. In 2 Corinthians 11:31 and Galatians 1:20 the denial stands “before God” and under God’s knowledge, treating lying as something God would recognize and judge. In 1 Timothy 2:7 the denial safeguards a claim about appointment and teaching; the verb functions in public ministry discourse, where credibility is at stake.

Other occurrences tie lying to concrete conduct and inner disposition. Acts 5:3–4 binds deception to the concealment of money (“keep back part of the price”), and the lie is traced to a decision “conceived…in your heart,” so lying is not accidental but intentional. James 3:14 links lying with “bitter jealousy and selfish ambition,” while 1 John 1:6 makes lying the inevitable result of a mismatch between what one says (“we have fellowship with him”) and how one walks (“in the darkness”). In these, ψεύδομαι marks falsehood as the outward speech-act of an inward corruption or inconsistency.

The verb is also used to underscore divine reliability by contrast. Hebrews 6:18 states that it is “impossible for God to lie,” and that impossibility is directly connected to “strong encouragement” and “hope.” Here lying is framed not only as a human sin to avoid, but as the very thing excluded from God’s character, giving stability to those who depend on God’s promises and refuge.

Finally, Revelation 3:9 shows ψεύδομαι operating at the level of communal identity and conflict. A group “say they are” something they “are not,” and the lie is embedded in a larger struggle. The passage anticipates a future recognition—“to know that I have loved you”—suggesting that lies about identity and belonging are not merely personal failings but can become instruments of opposition that will ultimately be exposed.

Closing Reflection

These texts repeatedly place lying in the presence of witnesses: persecutors who “say” evil “falsely” (Matthew 5:11), apostles who insist “before God” that they are “not lying” (Galatians 1:20), and God himself, for whom it is “impossible…to lie” (Hebrews 6:18). Whether the scene is a community command (“Don’t lie to one another,” Colossians 3:9) or a confrontation (“You haven’t lied to men, but to God,” Acts 5:4), ψεύδομαι is treated as speech that cannot remain a private matter, because it always addresses someone and stands to be answered by truth.

Sources: Lexical data from Strong’s Exhaustive Concordance and the Translators Brief Lexicon of Extended Strongs for Greek (STEPBible, CC BY). Occurrence data from the Translators Amalgamated Greek New Testament (STEPBible, CC BY). Scripture quotations from the World English Bible (public domain).