Jesus saved the thief on the cross and I don't think he was a good keeper of the commandments and this is grace by God that even tho we are sinners He can save us. Keeping the Sabbath or any commandment will not save you for is Jesus that saves you, not by works... but if the thief would have to come down from the cross and now a believer in Christ as his savior and if this thief would have many more years to live then he would have to live as a good christian and keep the commandments: 1Jn 2:4 He that saith, I knowe him, and keepeth not his commandements, is a lyer, and the trueth is not in him. James 1:22 But be doers of the word, and not hearers only, deceiving yourselves. Obedience is a fruit that a christian must obtain.
Remember the scripture that tells us to test the spirits?
Jesus said, if you love me you will keep my commands.
He also reiterated 9 of the 10 commandments. The 9 commands he reiterated, remembering he said if you love him you will keep his commands, are the moral laws of God. And they all pertain to love for God and our fellow man.
If you ever in your walk encounter someone who tells you the moral law of love as it were no longer applies, nor does the Sabbath, when Jesus worked on the Sabbath but he and his Disciples also kept the Sabbath, meaning the new covenant that is still made for us, doesn't have the strict prohibitions against any labors as the OT covenant did, you're likely encountering what is known as a humanist christian.
There's a television pastor , Joel Osteen, that is such a one as that. Baptismal humanist materialist christianity is what he teaches.
People that claim you can do anything you want when you're a Christian , because the moral laws no longer apply, are following the type of teaching an Osteen puts out there.
Someone forwarded me a video of his once . He was being interviewed by Larry King who is a Jew. Larry asked if Jews would go to Heaven.Joel said it was up to God. I'm paraphrasing of course. Then Larry asked about atheists and others not Christian, and all Osteen could keep answering to the matter of how someone goes to Heaven is, I don't know.
There's a reason for that. Because an actual pastor does know how to get to Heaven. Because they have read the scriptures, they know what Jesus taught. Those who don't know teach the exact opposite. And that discernment is part of what it means to test the spirits.
Beware that teacher with vipers tongue that challenges your faith brother. Those in the love of Christ do not teach his word in the spirit of hate. That's Satan's act, not Jesus'.