A generation raised in a graveyard stands on the edge of a new world. Moses doesn't just recite history; he re-activates a covenant for a crowd that wasn't there for the original lightning show. This is the 10 Commandments re-contextualized for survivors facing fresh temptations in the Promised Land.
The chapter reveals the 'Bridge of Mediation.' Because God is too holy for direct contact without catastrophe, He graciously allows a human representative to stand in the gap.
"Jesus ascends a mountain to offer a 'new' remix of the law, just as Moses does here in Moab."
"Contrasts the terrifying fire of Sinai with the accessible grace of Zion, acknowledging the people's fear in Deuteronomy 5."
In Exodus, the Sabbath is about Creation; in Deuteronomy 5, it's about Social Justice. It's a weekly strike against the slave-driving mentality of Egypt.
The phrase 'face to face' in verse 4 is an idiom for directness. The people actually didn't see a 'form' (Deut 4:12), they only heard the Voice.