I recently ( mid 2013) received two different questions through the internet about Sabbath keeping... and the responses I gave are given below.


    I appreciate your zeal for obeying God, and please understand we do not feel any differently about wanting to do what is right. The laws did not  "fall away" but were FULFILLED by Christ.   The PRINCIPLE of having a day of rest and worship is good, and Christians are not saying we should do away with that.  I presume you are aware that instead of a command about keeping the Sabbath being stated anywhere in the New Testament, we read in Col. 2:16 that we are to let no man judge us regarding "sabbaths"  Hmmm... I guess THAT could be called a command.  Also in Romans 14:5 we read that our choice of days we observe is  OK if we are persuaded in our own mind about it. I hope this (and information presented below from another response)   helps you to see that there are two sides to the story.
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Hello XXXXX   I appreciate your zeal and understand where you are coming from.  But the day of worship  "change"  started when the new covenant began and followers of Christ (rather than Moses) chose to worship on the first day of the week. It is a day memorializing the resurrection and is called the LORD'S day, so it in no way is meant to dishonor God.   
1. Jesus rose from the dead on the first day of the week after the Sabbath (John 20:1). He was the first fruit until eternal life others were also raised Mt.27:53. the resurrection is the capstone of our faith and the proving of the new covenant. he was raised for our justification..
2. Jesus appeared to ten of His disciples on that first day of the week (John 20:19).If he appeared on the 7th day do you think the Sabbatarians would use this to promote the Sabbath ?
3. Jesus waited one week, and on the next first day of the week appeared to the eleven disciples (John 20:26).
4. The promised coming of the Holy Spirit was fulfilled on the first day of the week, the day of Pentecost he was sent, (Pentecost by law came on the first day of the week (Lev. 23:16).
5. On the first day of the week the first gospel sermon  preached by an apostle on the death and resurrection of Jesus was by Peter (Acts 2:14).
6. On that first day of the week the three thousand converts were united into the   New Testament covenant separating from Judaism (Acts 2:41). While at the first Pentecost 3,000 were slain on this day God reversed it and instead they were given eternal life. The law kills the new covenant gives life.
7. On that same first day of the week the rite of Christian baptism into the Name of the Father, Son, and Holy Spirit was administered for the first time (Acts 2:41).
8. At Troas Paul preached to the assembled Christians on the first day of the week The only example of the Lord's supper being practiced on Sunday (Acts 20:6, 7). So did the churches of Galatia and Corinth.
9. Paul instructed the Christians at Corinth to make contributions on the first day of the week (I Cor. 16:2).Why did Paul specifically give orders to the church for this to be done on the "first day of the week."  Offerings are a part of worship itself. Offerings are a part of our worship and since offerings took place on the first day of the week, wouldn't it make sense that worship also took place on the same day of the week. This is only day in the New Testament that commands Christians to give, they would have to be gathered to do so.
10  (While I borrowed this info from another website, this #10 to me is the most significant one.)
Not only is the 4th commandment NOT repeated in the new testament (the other 9 are), but the COMMAND concerning sabbaths is found in Col. 2:16 where it says not to let any one JUDGE you in regard to sabbaths.    You weren't judging us, were you?
11.  Here is another bit of history for you.  "WE"  didn't change the sabbath... we are doing what has been done all along.  Ignatius 110 A.D. wrote in his epistle to the Magnesians 9…" If they who were concerned in old things, arrived at a newness of hope, no longer observing the Sabbath, but living according to the Lord’s day, by which our life sprung from him and by his death (whom certain persons deny)…we have been made his disciples, let us live according to Christianity."

   Barnabas 120A..D. "Wherefore, also, we keep the eighth day with joyfulness, the day, also, on which Jesus rose again from the dead"

   Justin Martyr 140 A..D. "Sunday is the day on which we all hold our common assembly, because it is the first day on which God,

         having wrought a change in the darkness, made the world; and Jesus Christ our savior , on the same day rose from the dead."

   Didache 80-90 A.D. "And on the day of our lords resurrection, which is the Lord’s day meet more diligently."


12.  The underlying issue is whether we are under "law" or under "grace"...and Romans 6:14 answers that.  There is a place where Paul indicates that the "letter of the law" killeth, but the spirit giveth life. I mention this because Seventh Day Adventists believe Ellen G. White had a vision in which there was a special light around the 4th Commandment...which logically would make us believe it to be the most important.   But what did CHRIST say when asked about the most important command?  He said to love God and love others in essence.   Let's not major on minors. 

If you feel I have not explained things fully, please feel free to write again.