Well Paul tells us if we have never known of biblical law we can show the requirements of the law(not some of the requirements) are written on our hearts, obviously by the way we act
I would never have known by instinct I should observe a set Saturday sabbath, so that law as written has obviously not been placed on my heart.
I wonder how many, who have never known of biblical law would by instinct set aside a set Saturday sabbath
But I get it, many think, if they do observe that day as a sabbath, they are being obedient, so other faults will not be viewed so seriously. But of course, that doesn't fit with: You MUST obey the TC
The law is written on our hearts in a general sense, so people naturally know right and wrong. But
specific commandments, like the Sabbath, are revealed by God to His people and must be taught and observed (Exodus 20:8–11 KJV; Ezekiel 20:12 KJV). The Sabbath is a
sign between God and His people, and Jesus Himself affirmed it, saying, “Think not that I am come to destroy the law… till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled” (Matthew 5:17–18 KJV), and “The sabbath was made for man, and not man for the sabbath” (Mark 2:27 KJV). Observing the Sabbath is not about instinct or feeling; it is about
obedience to God’s command.
The Ten Commandments, including the Sabbath, are binding for all who know them. But God also judges by
what is in the heart. Ezekiel explains that each person bears responsibility for their own actions: “The soul that sinneth, it shall die… The righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him” (Ezekiel 18:20 KJV). Jesus also taught that judgment considers
how people acted toward others and followed God’s truth in their hearts, not only what rules they knew (Matthew 25:31–46 KJV).
So, if someone has never known about the Sabbath but lives righteously according to the light they have, God is
just and merciful, and He will judge fairly. Ignorance does not excuse rebellion, but
God always weighs knowledge, opportunity, and heart
obedience. Love for God, keeping His moral ways, and acting righteously are what He values, and the Sabbath, when known, is part of the obedience He requires (John 14:15; Matthew 19:17; John 8:51 KJV).
God is perfectly just and sees the heart and knowledge of each person. If someone
truly does good—loves God, obeys His moral ways, cares for others—but
never knew about the Sabbath, they are
not automatically condemned for ignorance. God judges according to the truth that was revealed and what a person
could know. He takes into account whether someone had the opportunity to know and obey His commands (Deuteronomy 1:17; 2 Chronicles 19:7 KJV).