2 Corinthians3chapter 3

Letters of recommendation were the credentialing system of the ancient world. A traveller carried a letter from someone known to the host community vouching for his character and standing, and without one a stranger had no claim on hospitality or a hearing. Paul's rivals evidently arrived with excellent letters and expected some when they left.

His answer is that the Corinthians themselves are his letter — written not with ink but by the Spirit, not on stone tablets but on human hearts. The contrast between writing surfaces was concrete: stone for permanent public inscriptions, papyrus and ink for correspondence, and hearts for something no chisel could do.

The Moses passage draws on Exodus, where Moses' face shone after speaking with God and he veiled it before the people. Paul reads the veil as connected to the fading of that glory, and applies the same image to a veil over the reading of Moses in the synagogue.

Nothing in the chapter treats the old covenant as bad. Paul calls it glorious and then argues that a greater glory has come, the way lamplight is not shamed but simply outshone.