CharismaticLady, yes, you DO have to fight your nature to be righteous. If you did not fight, your moral muscles would become weak, and sin would run rampant in your life.
None of this has anything to do with the Sabbath, the resting on the seventh day. "Resting in the messiah" is not the spirit of hte law, it is the changing of the law to something completely different.
That is the reason for the New Covenant. You don't have to fight to be righteous. Now, you, yourself may because you do not have the power of Jesus who is God, the Creator, within you. But I have Him abiding in me, and I am in Him and we are one. He never sinned, and because of the resurrection, He gave me His power not to sin willfully either. He removed all of my transgressions, plus the nature that caused them and replaced it with a divine nature. The only thing left that needs to grow to perfection is the fruit of the Spirit, but those imperfections are cleansed immediately as long as I walk in the Spirit, which I do. I hear His voice, and always feel His love. Because of that, I can love others.
Because of Jesus we have the fulfillment of Daniel's prophecy NOW:
To finish the transgression,
To make an end of sins,
To make reconciliation for iniquity,
To bring in everlasting righteousness,
THIS is the New Covenant. The Ten Commandments were in place because of the sin nature which came about when Adam sinned, causing his pure human nature (free will) to be corrupted until it was removed, but only those who accept the Messiah, Jesus Christ. Now that the sin nature has been removed in those who willingly receive His indwelling to free us from sin, which He offers to the whole world to make the whole world His spiritual Israel, there is no more struggle with sin anymore. I've had His power in my for the past 45 years. You should have seem the first 30 years of going to church WITHOUT His Spirit. That is why you see Christians sinning. They do not have the Spirit in them, and without the Spirit of Christ indwelling them, they do not belong to Jesus. Satan doesn't care if you believe in Jesus, as long as you've accepted Him for selfish reasons - to sin with no condemnation. God does not accept them. This is what the New Testament says, but you and Jewitzu hate the New Covenant, and until you stop the hatred and stop fighting your own Messiah, you will always struggle with sin.