[good samaritan]

The purpose of the Sabbath relates to rest, yes, but the purpose for KEEPING it is to honour the true Creator God. Sabbath keeping is a mark of identification, that you worship Jehovah God the Creator.

The Sabbath was not instituted to honour God, but was created for the benefit of Israel. Observance to the Sabbath taught them that everyone should have rest, man, beast, and lands. Sabbath keeping is a mark of identification if we have entered His rest. We become new creatures.

They are rebellious and disobedient. He had given them "the word of the LORD" but they despised it. That word or message was one of rest.

Hebrews 4:2-3
2......For 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.
3......For 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.

That Word of God(gospel) is still one of rest if we believe, we then enter into it, similarly to what was offered to Israel.

The rest was comnected to the word of the LORD which had become nothing but "line upon line, precept upon precept" to the rebellious ones. As it is even today. God's precepts are considered tedious and burdensome to many. As a result, they do not find TRUE rest.

Rest and refreshing isn't about one's personal emotional state. It isn't about feelings. It is SPIRITUAL and has to do with being conformed to the will of God. The rest and refreshing God offers is NOT some emotional happy-place of feelgoodism. It is a SPIRITUAL and MORAL place of RIGHTEOUSNESS, being right with God, which manifests in obedience. Because a person who is right with God does not find His Word to be a bunch of endless burdensome precepts ("line upon line, line upon line, precept upon precept, precept upon precept").

We can only become right by God through the redemptive work of Jesus Christ. Jesus makes us right, and that process requires the Holy Ghost working in us. It is no longer us, but Gods Spirit working inside of us. If honoring a day brings someone that peace of mind, then they should, but I personally don’t see where it Carries over into the NT church. The law written in our hearts should cause a natural response, and not a burdensome life does and don’ts.

Barnes Notes:
To whom he said - To whom God had said; that is, to the Jews. He had taught them the way of rest through the prophets, but they had refused to learn.
This is the rest - That is, this is the true way of happiness, to wit, by keeping the commands of God which had been so often repeated as to become to them objects of satiety and disgust.

This is the refreshing - This is the way in which the mind may be comforted.
Poole's:
To whom he said, to which people the Lord, by his minister, said,

This, this doctrine or precept, as it is expressed, Isaiah 28:9,10, or the word of the Lord, as it follows, Isaiah 28:13, is the rest; the only way, in the observation of which you will find rest and satisfaction.

Cause the weary to rest, Heb. cause the weary (understand either soul or country) rest. As rest is offered to you by the prophets in God’s name, do you embrace it; which is to be done by hearkening to God’s word, as appears by the following clauses. So shall this people, which hath been so oft and so long wearied and harassed by great and manifold calamities, find rest and peace.

Yet they would not hear; they are wilfully ignorant, and obstinately refused the very means of instruction.

Yet the law brought no one any rest. The law was illustrated in the epistles as bondage.

Galatians 4:24
Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.

This rest we are speaking of is synonymous with the keeping of the Sabbath although it may not explicitly say it that way. I personally believe it is rightly dividing the word.

Keil and Delitzsch:
Jehovah would speak to the scoffing people of stammering tongue a language of the same kind, since He would speak to them by a people that stammered in their estimation, i.e., who talked as barbarians (cf., βαρβαρίζειν and balbutire; see Isaiah 33:19, compared with Deuteronomy 28:49). The Assyrian Semitic had the same sound in the ear of an Israelite, as Low Saxon (a provincial dialect) in the ear of an educated German; in addition to which, it was plentifully mixed up with Iranian, and possibly also with Tatar elements. This people would practically interpret the will of Jehovah in its own patios to the despisers of the prophet. Jehovah had directed them, through His prophets, after the judgments which they had experienced with sufficient severity (Isaiah 1:5.), into the true way to rest and refreshing (Jeremiah 6:16), and had exhorted them to give rest to the nation, which had suffered so much under Ahaz through the calamities of war (2 Chronicles 28), and not to drag it into another way by goading it on to rise against Assyria, or impose a new burden in addition to the tribute to Assyria by purchasing the help of Egypt. But they would not hearken (אבוּא equals אבוּ, Isaiah 30:15-16; Ges. 23, 3, Anm. 3). Their policy was a very different one from being still, or believing and waiting. And therefore the word of Jehovah, which they regarded as en endless series of trivial commands, would be turned in their case into an endless series of painful sufferings. To those who thought themselves so free, and lived so free, it would become a stone on which they would go to pieces, a net in which they would be snared, a trap in which they would be caught (compare Isaiah 8:14-15)

1 Corinthians 14:21-22
21......In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord.

as to their true and proper end
22......Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.

Isaiah 28 was definitely a prophecy that was written expressly for the readers in Isaiah’s day. Yet, It also had fulfillment in regards to tongues in the NT, as Paul was comparing it in 1 Corinthians 14.

I am supposed to do a Bible study next Saturday with a person who is similar to a seventh day Adventist and religiously vegan. He is Trinitarian and doesn’t believe in the Holy Ghost baptism as in the NT for today. I am not trying to pick a fight with this gentleman, but he has been trying to proselytize people from our church. I am the type of person who is open to discussion and am respectful to others point of view, but I often feel like that is misunderstood. I think he plans on converting me, or something???