Re-read Hebrews 4:8-10 and you will see there is another day [G2250] later on, that defined by its context, is for ever.
Heb 4:8-10
(8) For if Joshua had given them rest, God would not have spoken of another day later on.
(9) So then, there remains a Sabbath rest for the people of God,
(10) for whoever has entered God's rest has also rested from his works as God did from his.
You are looking back, while I am looking forward to meeting with Jesus Christ who is my Sabbath rest, now and forever more.
I am resting in the eternal love of God, while you are resting, on one day a week, from your lifetime of daily toil.
Context starts Hebrews chapter three.
But with whom was he grieved forty years? was it not with them that had
sinned, whose carcases fell in the wilderness? And to whom sware he that they should not enter into his
rest, but to them that believed not? So we see that they could not enter in because of
unbelief. (3:17-19)
The Rest mentioned above is the Gospel. It is the Rest which we enter when we are joined together with GOD through Christ through His Spirit; HIS Word in our hearts, minds and mouths. Joshua entering into the promised land was a shadow; a figure of the true Rest to which they were to take part of. Some did enter into the Promised land. But sadly they could not partake of the fruits thereof to the full extant because they had not partook of the true Rest i n Christ due to their willful sinning; unbelief.
This, also as Israel we are not partaking of if we are in a state of willful unbelief; sinning.
How do we know that this Rest mentioned in chapter 3 is the Gospel? Context; chapter four continues this dialog and brings this to light in verse two.
Let us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it.
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.
The Gospel words being preached did not profit them because They did not have faith. They were in a state of willful sin; unbelief.
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.
Staying within context the Rest mentioned above is still speaking of the Gospel. According to these verses this Rest which is the Gospel was available to enter into since the foundation of the World. It states plainly that the works for it were finished from the foundation of the World.
For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works. And in this place again, If they shall enter into my rest.
The above text is rather interesting in the Greek in respect to how the Seventh Day is worded. It's wording is rather specific by it's usage of definite articles. Here take a look.
ειρηκεν γαρ που περι της εβδομης ουτως και κατεπαυσεν ο θεος εν τη ημερα τη εβδομη απο παντων των εργων αυτου
For He spake in a certain place of the Seventh
day on this wise , And God did rest in the day the seventh from all his works. της εβδομης εν τη ημερα τη εβδομη G3588 G1442 G1722 G3588 G2250 G3588 G1442
He spake in a certain place and that place was Sinai. In Speaking the reason for the Sabbath HE said on Mt. Sinai, And GOD did rest IN THE DAY, THE SEVENTH from all HIS works. By the use of the definite articles this text is being extremely specific. Not a perpetual rest and not a millennia. A Rest in the Day the Seventh and then the week started over until the next seventh day of the week.
As the Text continues it says,
And in this
place again, If they shall enter into my rest.
The above verse actually says in this again. Place was added by the KJV translators. It is not there in the Greek. This here section of the verse is the actual bringing up of the Sabbath again for those whom have entered into the Rest which is the Gospel. Which is Christ, HIS Word in our hearts, minds and mouths. True salvation; LIFE through HIS Spirit.
In this place again, if they shall enter into my rest can be paraphrased like this. In this again HE speaks, if they shall enter into my Rest which is the Gospel.
Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
Once again following context the above verse's mentioning that it "remaineth that some must enter therein" is in respect to the previous clause, "If they shall enter into my rest". That Rest is the Gospel if we follow the sentence structure in relation to context. As mentioned earlier in they could not enter it due to willful sin; unbelief.
Again, 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. For if Jesus had given them rest, then would he not afterward have spoken of another day.
Verse 7 and 8 are a call to repentance in relation to verse six and five AND CHAPTER 3 VERSES SEVENTEEN THROUGH NINETEEN "They could not enter in because of unbelief"..
Repent HE says and accept The Rest which is the Gospel! Which some have yet to enter into due to unbelief; willful sin. TODAY is being spoken in relation to RIGHT NOW if we hear HIS voice accept the REST which is in Christ Jesus. A LIFE lead by HIS Spirit. HIS WORD in our hearts, minds and mouths. Joshua speaking of another day was in respect to MOST of them never truly entering into the Rest which is the Gospel which they had preached to them also but did not profit them not being mixed with faith in them that heard it..
There remaineth therefore a Sabbath keeping to the people of God. For he that is entered into his rest, he also hath ceased from his own works, as God did from his (
iN THE DAY THE SEVENTH).
There remaineth therefore a Sabbath keeping
(iN THE DAY THE SEVENTH) to the people of God is being being spoken in relation to verses 4 and 5 not 7 and 8. Remember GOD said through the Spirit HE spake in a certain place (Mt. Sinai of THE seventh on this wise, And God did rest THE seventh THE day from all his works. And in this again (HE SPEAKS), If they shall enter into my rest (THE GOSPEL). Verse 9 is picking up from this not the call to repentance in verse 7 and 8.
Verse ten goes onto say "For he that is entered into his rest, he
ALSO hath ceased from his own works,
AS God did from his."
If we enter into the Rest which is the GOSPEL the text goes on to says
WE ALSO (in addition to) cease from our own works AS (just like) GOD did from HIS (
iN THE DAY THE SEVENTH).
THESE ARE DIFFERENT, THEY ARE NOT THE SAME. WE CEASE FROM OUR WORK Like GOD did in the Day the Seventh.
Two separate things. A Sabbath Keeping in THE DAY THE SEVENTH which is a rest from physical labor as GOD did, and the GOSPEL REST which we enter into through Christ which GOD DID NOT for HE is our Rest. The Rest from our selves through HIS Spirit changing our hearts and minds.
Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief..
The above text's mentioning of rest is in respect to the Gospel rest not the Sabbath Keeping. The CEASING from work like GOD did in the Day, the Seventh.
(Heb 4:1-11)