So the NT writings say. I don't happen to find them inspired.
Where in scripture does it say you cannot help heal someone or feed yourself on the Sabbath?
St. Paul enumerates the Sabbath among the Jewish observances which are not obligatory on Christians (Colossians 2:16; Galatians 4:9-10; Romans 14:5).
Friend....you need to think like a Hebrew if you are going to read Paul's letters. The Colossians were Gentile Pagans prior to their conversion. They had no knowledge of these things before and Paul is instructing them in their observance! He is saying....pay no attention to criticism of these observances. Look at verse 8; of Colossians 2. He is talking about deceptive philosophy which depends on human tradition. Do you really thinks that God's Holy Days and Sabbaths are derived from "Human Traditions"?
Galatians 4:8 tells us that these folks formerly knew not God.....so the enslavement they were turning back to sure wasn't scriptural....it was Pagan!
Romans 14:5 is one of my favorites to refute. Paul is not talking about Sabbaths. He is talking about "Fast Days". Jesus himself mentioned it in Matthew 6:16. It is mentioned again in Luke 18:12. Fasting was very customary to Jews and some fasted more than others. Some fasted on particular days....others did not. If you notice in verse 1 of Romans 14 it says these are disputable opinions! Do you think Paul would be calling Sabbath observances disputable?
The 14th chapter of Romans is talking about vegetarianism and fasting....not Sabbath Day observances. Some folks in Rome did not want to eat meat as they thought it may have been sacrificed to idols in the meat market. See 1 Corinthians 8 for an explanation of this. Paul is saying "no big deal".