The Torah portion we read yesterday opens with one of the most seductive arguments in all of Jewish literature.

Korach comes to Moses with a seemingly airtight legal puzzle. A widow lives in a house filled entirely with techelet — the sacred blue wool of tzitzit. Does she still need a mezuzah on her doorpost? Her home is already wholly sanctified. What could one small scroll add? And a tallit woven entirely of blue — does it still need a single blue thread at its corner? The whole garment is already blue.

The logic is clean. A reasonable person might nod along.

That is precisely the point.

Korach’s arguments are not nonsense. They are coherent, internally consistent, and sound on the surface like the arguments of someone who has thought carefully about justice and holiness. But they are not meant to improve anything. They are meant to destroy. The criticism is real. The motivation is counterfeit. And that distinction — between criticism that seeks to build and criticism that seeks to take — is the moral spine of this parashah.

The Mishnah names it precisely: Kol machloket l’shem shamayim, sofa l’hitkayem — every controversy for the sake of heaven will endure. One that is not for the sake of heaven will not.

Machloket l’shem shamayim — argument for the sake of heaven — is not merely tolerated in Jewish tradition. It is celebrated. Hillel and Shammai argued about nearly everything for generations, and the Talmud declares of them: eilu v’eilu divrei Elohim chayyim — these and these are the words of the living God. Not because both were always right. Because both were arguing toward something larger than themselves. Both remained open to being wrong.

Korach’s controversy was she’einah l’shem shamayim — not for the sake of heaven. Not because his........

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