The meaning of all this is as follows. When it is said, "Today, if you will hear His voice," and so on, as has already been explained above, let us fear.
While the promise of entering His rest still remains, let none of you be found to have lagged behind and fallen away.
For when the Holy Spirit said, "Today, if you will hear His voice," this means at any time whatever. By this word, "today," the whole time until the end of the present life is embraced.
Therefore this word extends both to us and to those who will be on earth until the end of the world. Thus the promise of entering into rest preserves its force for us also.
It extends to us, if only we do not harden ourselves. Likewise, the threat of being deprived of it will overtake us if we fall into unbelief.
"For the Gospel was preached to us, as also to them." That is, we too have received the promise of entrance, just as our forefathers mentioned earlier did.
"But the word they heard did not profit them." The word of promises they heard brought them no profit, because they did not believe. For hearing alone is not enough; obedience is also needed.
It is not enough merely to hear; one must also believe. It did not profit them, because even when it had been received by hearing, it was not mixed with faith in them.
Or else: they were not joined by faith to those who heard and believed. Joshua the son of Nun and Caleb believed the promises of God, while all the rest did not believe (Num 14).
Then, in explanation of what has been said, the Apostle says: "For some, when they had heard, provoked Him, but not all who came out of Egypt with Moses."
Thus hearing did not profit those who heard but did not believe. For those who did not believe provoked God, and through this they perished.
Yet not all provoked Him. Joshua, as has been said, and Caleb believed, and through this they were saved. According to David's words cited above, those who did not believe offended God by this unbelief.
Therefore the One in whom they did not believe punished them, and swore that they would not enter His rest.
The Apostle clarifies both this and that by way of questions and answers. Against whom, he says, was He angry for forty years? Was it not against those who sinned? Yes, precisely.
By "those who sinned" he means those who did not believe in Him, for unbelief is sin, and indeed the gravest of sins. "Whose bones," or members, fell in the wilderness.
Again he asks: to whom did He swear that they would not enter His rest? Was it not to those who did not obey Him, who did not believe that they would possess the promised land?
We see that they could not enter it because of unbelief, and that for unbelief they all perished in the wilderness.
Such is the order of the Apostle's thoughts, beginning with the words, "some, when they had heard, provoked Him," and including the words, "that they could not enter because of unbelief."
In general, he expressed this thought. Just as mere hearing of the words of God brought no profit to those unbelievers, so mere hearing of the preaching of the Gospel will not profit us if we do not believe Christ's promises.
On the contrary, we too shall be deprived of His rest, by which I mean the Kingdom of Heaven, just as they were deprived of the promised land.
συγχεχραμένος, that is, λογος, is the generally accepted reading. Zigabenus adopts another reading, συγχεχραμένους, that is, ἐκεινους.