I too truly believe my rest is in Christ. For Jesus Himself told how it is written in the law that the priest PROFANED the Sabbath and are blameless. To study the OT is to know the priest WORKED ALL SEVEN DAYS doing sacrifice for themselves and the people, they never recognized a day of rest. From this scripture we know the priest themselves did not keep all the commandments. That is why the commandments were given to show us how helpless we are without a Savior and Redeemer, to show we can't keep them, to show us how much we need Christ in our lives..
As for those who claim they need to keep the whole law try to do it through their own righteousness and works, and they fail everytime. They deny Christ by laying claim that we need to keep the Law. Matt 9:12" They that be whole need not a physician, but they that are sick" This is why He is the Great Physician, all are sick NONE can keep all the law.
Oh I just get all worked up when I think of all He has done for me PRAISE HIS HOLY NAME he saved me from being under a law I can't keep, none of us ever where expected to keep.
And REV 1:6 .."and has made US kings and priests" speaking of what Christ has done for us. 1 Peter 2:5 Ye are, as lively stones, are built up a spiritual house, a holy priesthood, to offer up spiritual sacrifices, acceptable to God by Jesus Christ."
If the priest in the OT profaned the Sabbath and are blameless, then I believe we, as priest who continually offer up spiritual sacrifices acceptable to God by Jesus Christ( our Sabbath) then how could we also not be held blameless
Hebrews 9:1-28