Deuteronomy 30:6 → Deuteronomy 10:16

The lexical repetition is exact, and vault-verified: both verses use the verb מוּל (mûl, H4135) with לֵבָב (lēbāb, H3824) — the only two heart-circumcision texts in Deuteronomy. At 10:16 it is an imperative laid on Israel: "Circumcise your hearts, therefore, and stiffen your necks no more." At 30:6 the same rare collocation returns with the grammar inverted — the subject is no longer Israel but God: "The LORD your God will circumcise your hearts and the hearts of your descendants, and you will love Him with all your heart and with all your soul, so that you may live." Between the command and the promise stands Moses' own diagnosis of inability: "Yet to this day the LORD has not given you a mind to understand, eyes to see, or ears to hear" (Deut 29:4) — the covenant people, addressed by the command, lack the very organ the command requires (29:4's own canonical career runs through Jeremiah 31:31-34 to Deuteronomy 29:1-4). The Connection Method is Promise-Fulfillment because 30:6 does not restate or intensify the command but answers it — the demanded self-surgery Israel cannot perform is transposed into a divine pledge, set after exile in the oracle's own timeline (30:1-5), which is precisely the promissory line Jeremiah develops into the new covenant (Jer 4:4; 31:33), Ezekiel into the new heart (Ezek 36:26), and Paul declares realized in Christ by the Spirit: "circumcision is a matter of the heart, by the Spirit" (Rom 2:29 — see Romans 2:25-29 to Deuteronomy 10:16; cf. Col 2:11, the circumcision "done by Christ"). A companion pair, Deuteronomy 30:6 to Deuteronomy 6:5, carries the promise's purpose clause back to the Shema's love-command; this pair carries its surgical clause back to the command it answers. The telos is the relief hidden in the changed subject of one verb: the knife passes from Israel's hand to God's, and what the law demanded as a condition of life God promises as a gift that produces it — a heart circumcised not merely to obey but to love Him, and in loving Him, to live. The gospel is here in seed: God Himself will work in His people the very thing He requires of them, and the end of His surgery is not bare compliance but delight in the God who performed it.