First off, no commandment was made on that seventh day. It was just written that the Lord rested on that 7th day from creating the heavens and the earth in six days.
Were you there? How do you know a commandment wasn't made?
And, more was written than that the Lord rested on the 7th day from creating the heavens and the earth in 6 days, as you claim:
Genesis 2:3 Then God blessed the seventh day and sanctified it, because on that day He rested from all the work of creation that He had accomplished.
Why would He need to bless it and sanctify it if it was never to be used again?
"Sanctify" means to set apart for holy use.
Why was there even a seven-day cycle to begin with to show when the Sabbath occurred and was to be kept if no one had been keeping it?
Second thing is; if everybody was keeping the sabbath day, Gentiles & Jews alike, there would be no need for that commandment in the first place when Israel became a nation after leaving Egypt.
...unless they had abandoned or forgotten it, in which case, the commandment might appropriately begin with the word "Remember," as, indeed, it does.
A brief look at Exodus 16 reveals that, in fact, the commandment already existed before Sinai.
Third thing is, the sabbath day commandment did not end for why Jesus admitted indirectly that His disciples were profaning the sabbath, but you have to discern why & how they were guiltless that day in
Matthew 12:1-7
You really don't have to discern anything here, as we have already discussed. The meaning of the text can be understood by a plain reading.
Fourth thing is; part of keeping that commandment is to stone those among them that were not. So where is that careful instructions among the churches of Jews & Gentile believers in Christ not to stone anyone for breaking the sabbath day?
Well, you wouldn't find those careful instructions in a New Testament which was ushering in the spiritual Kindom of God that was intended to replace the theocracy in place beforehand. Remember the story of the woman caught in adultery that we discussed before?
Fifth thing is; also part of keeping the sabbath day commandment is not to have anyone working for you on that sabbath day. That means not taking advantage of other people working on the sabbath at gas stations, the markets, and restaurants when any needs should have been done the day before so you would not be doing that on the sabbath.
...which seems like a good idea, since causing another person to violate something we wouldn't, ourselves, violate wouldn't be very nice, would it?
Sixth thing is; you are not even allowed to cook on the sabbath but prepare meals the day before so it is ready on the sabbath.
As stated before, what's wrong with that? Modern technology makes this accommodation even less labor-intensive than it was for the Israelites coming out of Egypt.
Seventh thing is; if a believer still had to "work" in observing the sabbath day commandment, then where is that rest in Jesus Christ?
Things have to get done to sustain life and other Sabbath activities and worship. God is very practical. Physical rest is not the main point of the Sabbath. God is very busy on the Sabbath. When He rested after creating the earth, did He let the universe go to pot and fall apart?
That is why Jesus is Lord of the sabbath and not the sabbath day "lord" over Jesus Christ.
Your conclusion doesn't follow. Jesus said explicitly that He kept His Father's commandments (John 15:10).
The elephant is yours unless you can answer these 7 obvious contentions.
What we're really talking about here is burden of proof. We (Sabbath-keepers) simply observe, witness, and affirm that the Seventh-day Sabbath of the Lord is forever sanctified by God and His Word, and is, in every way a commandment of God just as much as the other nine. In doing this we are accused of perpetrating a falsehood. We accuse no one of anything. The burden of proof is on the accuser. This is how the Judeo-Christian adversarial system of justice works.
The defense of the gospel and the faith in Jesus Christ rests for why you & I are guiltless for profaning the sabbath because He is in us always.
There is no defense to rest for a party who is not being accused of anything. I accuse no one of profaning the Sabbath. I merely testify to its perpetuity.