Sabbath, which is Friday at sunset to Saturday at sunset, is the 4th commandment. Do you honor the Sabbath? What happens if you break it? How do you recover if you sin by doing some work on the Sabbath?
"Having died with Him, so that we no longer live for ourselves but for Him who died and rose again."
"Let us therefore fear, lest, a promise being left of entering into his rest, any of you should seem to come short of it. For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard. For we which have believed do enter into rest, as He said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world. For he spoke in a certain place of the seventh on this wise: And God did rest the seventh day from all His works. And in this again, If they shall enter into my rest. Seeing therefore it remains that some must enter therein, and they to whom it was first preached entered not in because of unbelief: again, He limited a certain day, saying in David: To day, after so long a time; as it is said, To day if you will hear His voice, harden not your hearts. For if Jesus had given them rest, then would He not afterward have spoken of another day. There remains therefore a rest to the people of God. For he that is entered into His rest, he also hath ceased from his own works, as God from his. Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief."
When we have died with Him we enter into rest. "A dead man is free from sin."
"One man regards a certain day above the others, while someone else considers every day alike. Each one should be fully convinced in his own mind." When we no longer live for ourselves but in the death and Resurrection of Christ, we no longer work as the letter of law killed us. What matters is that we grow up in Love, to Love our enemies.
I heard in my heart: don't be concerned.