The Bible uses the phrase, even a law you make unto yourself: the point being, no man can even keep a law he creates for himself. Not only is his law wrong, but he can't even keep it. He is conflicted and in need of salvation.

What does Paul teach concerning the Sabbath? He maintains that the Sabbath is a thing that has passed away: “having blotted out the bond written in ordinances that was against us, which was contrary to us: and he hath taken it out of the way, nailing it to the cross . . . Let no man therefore judge you in meat, or in drink, or in respect of a feast day or a new moon or a sabbath day: which are a shadow of the things to come; but the body is Christ’s” (Col. 2.14,16-17).

If you can't be judged for not keeping the Sabbath, the burden of the proof remains on you to show otherwise. The things to come have already arrived. Jesus already died on the cross and gave His Spirit to indwell, that rest which the Sabbath points to and fills up, so no longer keep the Sabbath.