We are probably on the same page. It represents the rest that we have through the finished work of Jesus Christ on the Cross, and we enter into that through faith.
Jesus is our spiritual rest..not a physical rest like the Sabbath law. When the reality came, we no longer need the shadow (Colossians 2:16-17).
I sometimes wonder how Sabbathkeepers would have reacted to a slave coming into the NT church, whose unbelieving master would not let him have Saturday off. Would they simply have consigned the guy to hell?