Exodus 19:9

Verse Exodus 19:9. A thick cloud] This is interpreted by Exodus 19:18: And Mount Sinai was altogether on a SMOKE-and the SMOKE thereof ascended as the SMOKE of a furnace; his usual appearance was in the cloudy pillar, which we may suppose was generally clear and luminous.

That the people may hear] Exodus 15:9, Exodus 15:9. The Jews consider this as the fullest evidence their fathers had of the Divine mission of Moses; themselves were permitted to see this awfully glorious sight, and to hear God himself speak out of the thick darkness: for before this, as Rabbi Maymon remarks, they might have thought that Moses wrought his miracles by sorcery or enchantment; but now, hearing the voice of God himself, they could no longer disbelieve nor even doubt.