Do Not Deceive
The Third Clause — Truth at the Level of Words
Leviticus 19:11's triple cluster closes with “lo tishakru” — do not lie one to another. The three commandments of the verse address a progression: theft (#354) takes property; denial (#353) hides the taking with a false claim about facts; lying (#355) constructs false reality through words alone, without any prior taking. Commandment #355 is the prohibition on deception as such — the production of false beliefs in another person's mind, regardless of whether any prior action has occurred.
The word “sheker” (lie/falsehood) appears across the Torah and Nevi'im as one of the most condemned qualities of a covenant community. Exodus 23:7: “Keep thee far from a false matter.” The distance the Torah commands is not merely prohibition — it is spatial: stay away from falsehood. The commandment does not only prohibit active lying; it instructs a posture of avoidance, of not placing oneself in situations where deception becomes tempting or necessary.
Geneivat Da'at — Stealing the Mind
The Talmud's concept of geneivat da'at (Chullin 94a) extends commandment #355 to cover deception through action rather than speech alone. The mechanism: any act designed to produce a false impression in the other person's mind is prohibited, even if every statement made is literally true. Specific examples: opening wine you had already planned to open, making it appear you are doing something special for your guest. Offering gifts you know the recipient cannot accept, to create a false appearance of generosity. Presenting a repaired item as new.
The “stealing” metaphor in geneivat da'at is theologically precise. Commandment #354 prohibits taking property from another person. Geneivat da'at takes something more intimate — the person's accurate understanding of what is happening between you. Both forms of geneivah take without consent; both violate the boundary between what belongs to the person and what belongs to you. Property theft takes what is theirs materially; geneivat da'at takes what is theirs epistemically — their right to accurate information about the world they inhabit.
Truth as Covenant Foundation
Zechariah 8:16–17: “These are the things that ye shall do: Speak ye every man the truth to his neighbour; execute the judgment of truth and peace in your gates.” Zechariah wrote during the post-exilic reconstruction — the moment when a shattered community was rebuilding its covenant life. His list of requirements begins not with the temple, not with the law courts, not with political organization: it begins with truth in speech. The community that cannot speak truthfully to its neighbours cannot build functioning courts; courts that rule on false premises cannot produce peace; peace that rests on false foundations cannot last.
The sequence in Zechariah 8:16–17 connects commandment #355 to the inner life: after prohibiting false speech, Zechariah prohibits “imagining evil in your hearts against his neighbour.” External deception and internal malice are linked: both involve constructing false realities, one external (the lie spoken), one internal (the evil imagined). Commandment #355 governs the external; the commandments that follow (#356–360) address the internal. The Leviticus 19 cluster and the Zechariah 8 vision converge: the covenant community is built on truth at every level — in words, in commerce, and in the inner life.
- Jacob Deceiving Isaac — Gen 27: dressed in Esau's clothes with goat skins on his hands, Jacob presented himself to his blind father as Esau. He created a false impression through action and speech. Isaac asked directly: “Art thou my very son Esau?” Jacob answered: “I am.” The consequences: years of exile, never seeing his mother Rebekah again, and the family fracture that lasted for decades.
- The False Prophet — Deuteronomy 13:1–5 and 18:20 describe the prophet who speaks falsely in God's name. The false prophet is commandment #355's most extreme violator — they deploy deception not merely in commerce or personal relations but at the level of divine communication, creating false impressions about God's will.
- Zechariah — Zech 8:16–17: the post-exilic prophet who placed truth in speech as the first requirement of covenant restoration. His vision of the rebuilt community begins not with sacrifice or law but with honest words between neighbors — commandment #355 as the foundation of everything that follows.
Read the source passage in the Torah reader.
Read in the Torah Reader — Leviticus 19:11