The original poster made an excellent point with a reference to Acts 15. For 2000 years many words have been spoken in an attempt to subvert souls to keep laws but none of them will ever change the Holy Ghost decision that went forth on that day...
22Then pleased it the apostles and elders, with the whole church, to send chosen men of their own company to Antioch with Paul and Barnabas;
namely, Judas surnamed Barsabas, and Silas, chief men among the brethren:
23And they wrote
letters by them after this manner; The apostles and elders and brethren
send greeting unto the brethren which are of the Gentiles in Antioch and Syria and Cilicia:
24Forasmuch as we have heard, that certain which went out from us have troubled you with words, subverting your souls, saying,
Ye must be circumcised, and keep the law: to whom we gave no
such commandment:
25It seemed good unto us, being assembled with one accord, to send chosen men unto you with our beloved Barnabas and Paul,
26Men that have hazarded their lives for the name of our Lord Jesus Christ.
27We have sent therefore Judas and Silas, who shall also tell
you the same things by mouth.
28For it seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things;
29That ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well.
Hebrews 4
1Let us therefore fear, lest, a promise being left
us of entering into his rest, any of you should seem to come short of it.
2For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard
it.
3For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
4For he spake in a certain place of the seventh
day on this wise, And God did rest the seventh day from all his works.
5And in this
place again, If they shall enter into my rest.
6Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
7Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
8For if Jesus had given them rest, then would he not afterward have spoken of another day.
9There remaineth therefore a rest to the people of God.
10For he that is entered into his rest, he also hath ceased from his own works, as God
did from his.
11Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
12For the word of God
is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and
is a discerner of the thoughts and intents of the heart.
13Neither is there any creature that is not manifest in his sight: but all things
are naked and opened unto the eyes of him with whom we have to do.
Colossians 2
14Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast
our profession.
15For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as
we are, yet without sin.
16Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
And ye are complete in him, which is the head of all principality and power:
11In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ:
12Buried with him in baptism, wherein also ye are risen with
him through the faith of the operation of God, who hath raised him from the dead.
13And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;
14Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;
15And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it.
16Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath
days:
17Which are a shadow of things to come; but the body
is of Christ.
Ask a sabbath keeper how he keeps the sabbath and you will not get two of them to give you the same answer.