The old testament law is for Old Testament Jews, came from the 10 commandments, and is considered to be bondage. Christians in the New Testament go by the promise and freedom. In Galatians 4, we are told to cast the Old Testament law away.
Galatians 4:21-26 KJV
Tell me, ye that desire to be under the law, do ye not hear the law?  For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.  But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.  Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.  For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.  But Jerusalem which is above is free, which is the mother of us all.
Galatians 4:30-31 KJV
Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.  So then, brethren, we are not children of the bondwoman, but of the free.
In our freedom, we are not to follow our flesh and sin. We are to follow what the Holy Spirit teaches us. We are under the law of the spirit, and we are no longer under the old testament law.
Galatians 5:1 KJV
Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.
Galatians 5:16-18 KJV
This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.  For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.  But if ye be led of the Spirit, ye are not under the law.
The Ten Commandments (Old Testament law) were known as the ministration of death and condemnation and had glory. But the ministration of the spirit and righteousness was presented in verse 8. Paul was contrasting the two, which both had glory and said that the holy spirit was better.
Verses 13-14 talk about the abolishment of the old testament law. But their minds were blinded, because the vail is done away with Christ. That makes the Seventh-day Adventist a blind church.
2 Corinthians 3:7,9,11,13-14 KJV
But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away:  For if the ministration of condemnation be glory, much more doth the ministration of righteousness exceed in glory.  For if that which is done away was glorious, much more that which remaineth is glorious.  And not as Moses, which put a vail over his face, that the children of Israel could not stedfastly look to the end of that which is abolished:  But their minds were blinded: for until this day remaineth the same vail untaken away in the reading of the old testament; which vail is done away in Christ.
The law is not of faith. The Seventh-day Adventists will say that if you have faith, you will have to follow the law, but the Bible clearly disagrees.
Galatians 3:12 KJV
And the law is not of faith: but, The man that doeth them shall live in them.
Why did the old testament people keep the old testament? Because faith had not yet come. But now, faith is here; the purpose of the law was to lead you to faith.
Galatians 3:23-25 KJV
But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.  Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.  But after that faith is come, we are no longer under a schoolmaster.
If they say that someone is saved by faith and needs to follow the law, we can show them this. They are going back to a curse when they go back to the law.
Galatians 3:10-13 KJV
For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them.  But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith.  And the law is not of faith: but, The man that doeth them shall live in them.  Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree:
Acts 15 is the best church history passage. If we look at it, it doesn’t say be vegetarians, observe the Sabbath, or anything like that. Christians observe verse 29 to this day.
Acts 15:22,24 KJV
Then 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:  Forasmuch 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:
Acts 15:25,29 KJV
It seemed good unto us, being assembled with one accord, to send chosen men unto you with our beloved Barnabas and Paul,  That 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.
The church day when they took an offering is on the first day of the week, not the Sabbath.
1 Corinthians 16:2 KJV
Upon the first day of the week let every one of you lay by him in store, as God hath prospered him, that there be no gatherings when I come.
Paul used Sunday to break bread and preach to people, which was a typical church service as described in Acts 2, 3, 4, and 5.
Acts 20:7 KJV
And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.
This is Robertson’s book – The White Truth, 1981, page 61. “What we are as a church is a reflection of our faith in the divine authority evident in the writings of Ellen G White.”
They believe that she was a prophetess with divine authority. If she crumbles, the religion crumbles.
Deuteronomy 13: 1-3
If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder, And the sign or the wonder come to pass, whereof he spake unto thee, saying, Let us go after other gods, which thou hast not known, and let us serve them; Thou shalt not hearken unto the words of that prophet, or that dreamer of dreams: for the Lord your God proveth you, to know whether ye love the Lord your God with all your heart and with all your soul.
Deuteronomy 18: 20-22 But the prophet, which shall presume to speak a word in my name, which I have not commanded him to speak, or that shall speak in the name of other gods, even that prophet shall die. And if thou say in thine heart, How shall we know the word which the Lord hath not spoken? When a prophet speaketh in the name of the Lord, if the thing follow not, nor come to pass, that is the thing which the Lord hath not spoken, but the prophet hath spoken it presumptuously: thou shalt not be afraid of him.