Psalm 80 shows that the Shepherd of Israel sat between the Cherubim in the Holy of Holies, showing that Jesus Christ is the God who interacted with Israel.
When Moses uses the metaphor of a rock, he thinks of the connotative qualities of enduring, unchanging, solid, awesome, strong, majestic, and beautiful.
In the peace offering, Christ is the priest, offeror, and offering. Since all parties share the peace offering as a meal, it exemplifies a peaceful communion.
As long as we are slaves of sin and following the dictates of our lusts, we have no free moral agency. God liberates us from sin so we are free to obey Him.