Parts 1 and 2 root the Sabbath in creation itself, the seventh-day pattern of work and rest, show God’s providence in the wilderness manna account, and establish it as one of the Ten Commandments with real, recorded consequences for violating it – all pointing forward to a future rest for God’s people.
Part 3 turns to the meaning of work and rest for man, a foretaste of eternal, joyful labor under God, and reframes the Sabbath as freedom rather than restriction: Christ, as Lord of the Sabbath, releases man from slavery to his own works and restlessness, teaching believers to rest in God’s sufficiency rather than their own strength.