1 John 1:1 → Exodus 19:12-13

The sharpest single point of the Sinai-reversal: at the mountain, the holy was untouchable on pain of death — "Be careful not to go up on the mountain or touch its base. Whoever touches the mountain shall surely be put to death" (Exod 19:12-13) — yet John declares of the incarnate Word, "which we have gazed upon and touched with our own hands." The lexical hook runs through Hebrews rather than through Exodus itself (the Septuagint of Exodus 19:12-13 uses a different verb for "touch"), so the reversal is thematic, not a verbal citation of Sinai: Hebrews 12:18 describes Sinai precisely as "a mountain that can be touched" using ψηλαφάω, and John's verb in 1 John 1:1 is the same root (ἐψηλάφησαν). What Sinai forbade under threat of death, the apostles did to God Himself in the flesh: they handled Him. The point is not that the Sinai prohibition was trivial or revoked but that the untouchable Holy One has, in the incarnation, made Himself touchable — and the touch that should have brought death now mediates eternal life (1 John 1:1-2). The verse most fully exhibits the trajectory's resolution: the God who could not be touched at Sinai is, in Christ, the desirable God whom faith may now handle and hold (cf. Luke 24:39, "Touch Me and see"). This pairs with 1 John 1:1 to Deuteronomy 4:12 (the heard/saw-no-form reversal) and 1 John 1:1 to Exodus 19:21 (the gaze reversal); together the three catalog John's fourfold sensory reversal of the Sinai prohibitions. The psēlaphaō link itself runs 1 John 1:1 ↔ Hebrews 12:18, but as a same-Testament allusion it is anchored here to the Sinai prohibition (Exod 19:12-13) that both NT texts reverse.