As the Holy Ghost saith, etc. This availed much more to touch their hearts than if he had quoted David by name. And it is useful for us to familiarize ourselves with such expressions, so that we may remember that the words adduced from the books of the prophets are those of God and not of men. But as this sentence, Today, if ye will hear his voice, is a part of a former verse, some have not unsuitably rendered it thus, "Would to God you would this day hear his voice." It is indeed certain that when David called the Jews God's people, he immediately drew this conclusion, that the voice of God ought to have been heard by them; for as to those whom he there invited to sing praises to God and to celebrate his goodness, he reminded them at the same time that obedience was the chief worship which he required, and that it was better than all sacrifices. The chief thing, then, was to obey the word of God.

Footnotes

1 - There is the same parenthesis in our version; but Beza, Doddridge, Macknight, and Stuart, do not use it, but connect "therefore" or wherefore with "harden not," which seems more suitable. -- Ed.

Wherefore - In view of the fact that the Author of the Christian dispensation has a rank far superior to that of Moses. Because Christ has claims on us far greater than those which Moses had, let us hearken to his voice, and dread his displeasure.
As the Holy Ghost saith - In Psalm 95:7-11. This is full proof that in the estimation of the author of this Epistle the writer of this Psalm was inspired. The Holy Spirit speaks through the word which he has revealed. The apostle quotes this passage and applies it to those whom he addressed, because the admonition was as pertinent and important under the Christian dispensation, as it was under the Jewish. The danger of hardening the heart by neglecting to hear his voice was as great, and the consequences would be as fearful and alarming. We should regard the solemn warnings in the Old Testament against sin, and against the danger of apostasy, as addressed by the Holy Spirit to us. They are as applicable to us as they were to those to whom they were at first addressed; and we need all the influence of such appeals, to keep us from apostasy as much as they did.
Today - Now; at present. At the very time when the command is addressed to you. It is not to be put off until tomorrow. All God's commands relate to "the present" - to this day - to the passing moment. He gives us no commands "about the future." He does not require us to repent and to turn to him "tomorrow," or 10 years hence. The reasons are obvious:
(1) Duty pertains to the present. It is our duty to turn from sin, and to love him now.
(2) we know not that we shall live to another day. A command, therefore, could not extend to that time unless it were accompanied with "a revelation" that we should live until then - and such a revelation God does not choose to give. Every one, therefore, should feel that whatever commands God addresses to him are addressed to him now. Whatever guilt he incurs by neglecting those commands is incurred now. For the present neglect and disobedience each one is to answer - and each one must give account to God for what he does today.
If ye will hear - In case you are willing to hearken to God, listen now, and do not defer it to a future period. There is much in a "willingness" to hear the voice of God. A willingness to learn is usually the precursor of great attainments in knowledge. A "willingness" to reform, is usually the precursor of reformation. Get a man "willing" to break off his habits of profaneness or intemperance, and usually all the rest is easy. The great difficulty in the mind of a sinner is in his will. He is unwilling to hear the voice of God; unwilling that he should reign over him; unwilling now to attend to religion. While this unwillingness lasts he will make no efforts, and he sees, or creates a thousand difficulties in the way of his becoming a Christian. But when that unwillingness is overcome, and he is disposed to engage in the work of religion, difficulties vanish, and the work of salvation becomes easy.
His voice - The voice of God speaking to us:
(1) in his written word;
(2) in the preached gospel;
(3) in our own consciences;
(4) in the events of his Providence;
(5) in the admonitions of our relatives and friends. Whatever conveys to us the truth of God, or is adapted to impress that on us, may be regarded as "his voice" speaking to us. He thus speaks to us "every day" in some of these ways; and every day, therefore, he may entreat us not to harden our hearts.

Wherefore (as the Holy Ghost saith, Today - These words are quoted from Psalm 95:7; and as they were written by David, and attributed here to the Holy Ghost, it proves that David wrote, by the inspiration of God's Holy Spirit. As these words were originally a warning to the Israelites not to provoke God, lest they should be excluded from that rest which he had promised them, the apostle uses them here to persuade the Christians in Palestine to hold fast their religious privileges, and, the grace they had received, lest they should come short of that state of future glory which Christ had prepared for them. The words strongly imply, as indeed does the whole epistle, the possibility of falling from the grace of God, and perishing everlastingly; and without this supposition these words, and all such like, which make more than two-thirds of the whole of Divine revelation, would have neither sense nor meaning. Why should God entreat man to receive his mercy, if he have rendered this impossible? Why should he exhort a believer to persevere, if it be impossible for him to fall away? What contemptible quibbling have men used to maintain a false and dangerous tenet against the whole tenor of the word of God! Angels fell - Adam fell - Solomon fell - and multitudes of believers have fallen, and, for aught we know, rose no more; and yet we are told that we cannot finally lose the benefits of our conversion! Satan preached this doctrine to our first parents; they believed him, sinned, and fell; and brought a whole world to ruin!

Wherefore (as the Holy Ghost saith, To day if ye (f) will hear his voice,
(f) So that God was to speak once again after Moses.

Wherefore, as the Holy Ghost saith,.... In Psalm 95:7
today if you will hear his voice; either the precepts of Christ, to hear which is to obey them; and this is an acknowledgment to Christ as King of saints, and is a testimony of love to him, and is wellpleasing in his sight; and in which the saints find pleasure themselves, and profit also: or the Gospel of Christ, which is a voice of love, grace, and mercy; of peace and reconciliation; of pardon and righteousness; of liberty, redemption, and salvation by Christ; and to hear it, is not only to hear it externally, but internally, so as to understand it, and distinguish it from the voice of a stranger, and to approve of it, and believe it, and put in practice what is heard: and "today" may intend some festival day in David's time, when, and on account of which, this psalm was penned; as the feast of tabernacles, which was a type of Christ tabernacling in human nature; or it may regard the time of man's life, while it is day, or the present instant of life: or rather the whole Gospel dispensation. The psalm from whence these and some following words are taken, belongs to the Messiah; for the person the subject of it, is called the rock of our salvation; and every thing in it is applicable to him; as the ascription of deity, and divine worship; the creation and preservation of the universe; yea, he is represented as a shepherd, and the saints as his sheep; which plainly points at the office of Christ; and these very words are often made use of by the Jews, and applied to the Messiah, showing that if the Jews would repent but one day, or keep the sabbath but one day, the son of David, the Messiah, would come; since it is said, "today if you will hear his voice" (d); which the Chaldee paraphrase renders "his Word", his essential Word, the Lord Jesus Christ.
(d) T. Bab. Sanhedrin, fol. 98. 1. Shemot Rabba, sect. 25. fol. 109. 3. & Shirhashirim Rabba, fol. 19. 3.

Days of temptation are often days of provocation. But to provoke God, when he is letting us see that we entirely depend and live upon him, is a provocation indeed. The hardening of the heart is the spring of all other sins. The sins of others, especially of our relations, should be warnings to us. All sin, especially sin committed by God's professing, privileged people, not only provokes God, but it grieves him. God is loth to destroy any in, or for their sin; he waits long to be gracious to them. But sin, long persisted in, will make God's wrath discover itself in destroying the impenitent; there is no resting under the wrath of God. "Take heed:" all who would get safe to heaven must look about them; if once we allow ourselves to distrust God, we may soon desert him. Let those that think they stand, take heed lest they fall. Since to-morrow is not ours, we must make the best improvement of this day. And there are none, even the strongest of the flock, who do not need help of other Christians. Neither are there any so low and despised, but the care of their standing in the faith, and of their safety, belongs to all. Sin has so many ways and colours, that we need more eyes than ours own. Sin appears fair, but is vile; it appears pleasant, but is destructive; it promises much, but performs nothing. The deceitfulness of sin hardens the soul; one sin allowed makes way for another; and every act of sin confirms the habit. Let every one beware of sin.

Exhortation from Psalm 95:7-11, not through unbelief to lose participation in the spiritual house. Seeing that we are the house of God if we hold fast our confidence . . . (Hebrews 3:6). Jesus is "faithful," be not ye unfaithful (Hebrews 3:2, Hebrews 3:12). The sentence beginning with "wherefore," interrupted by the parenthesis confirming the argument from Psalm 95:7-11, is completed at Hebrews 3:12, "Take heed," &c.
Holy Ghost saith--by the inspired Psalmist; so that the words of the latter are the words of God Himself.
To-day--at length; in David's day, as contrasted with the days of Moses in the wilderness, and the whole time since then, during which they had been rebellious against God's voice; as for instance, in the wilderness (Hebrews 3:8). The Psalm, each fresh time when used in public worship, by "to-day," will mean the particular day when it was, or is, used.
hear--obediently.
his voice--of grace.

Wherefore. Take warning from the fate of Israel.
As the Holy Ghost saith. The words quoted are found in Psalm 95:7-11. David there exhorts his brethren to learn a lesson from Israel in the wilderness, and not to provoke God.
To-day if you will hear his voice. At that very time. So to-day, and ever, God wishes us to hear him, to-day, not to-morrow.
Harden not your hearts. To harden the heart is to reach such a state that God's voice makes no impression.
As in the provocation. The Hebrew of the Psalm says Like Meribah. The meaning is "Harden not your hearts as our fathers did at Meribah." See the account in Exodus 17:1-7. See also Numbers 27:14, where Kadesh Meribah is named. Both may be referred to.
Day of temptation. Day of trial.
When your fathers tempted me, proved me. Tempted me by proving me. Seeing how much murmuring and sin I would endure.
Saw my works forty years. All his mighty manifestations in their behalf during all the period of their sojourn in the wilderness.
Wherefore I was grieved. The word more nearly means "disgusted."
They do alway err. Not simply by making mistakes, but their hearts are wrong.
So I sware in my wrath. A figure of speech which means that God, indignant at their unbelief and sin, declared they should not enter Canaan. See Numbers. 14:20-35.
Shall not enter my rest. Canaan, while the Israelites were yet in bondage, was promised as a land of rest. On the weary journey in the wilderness it was still looked to as the rest. To prohibit from entering the rest was then to prohibit from entering Canaan. It is, however, a type of heaven, the land of eternal rest. Hence, the warnings that are pointed out in the next verses.

Wherefore - Seeing he is faithful, be not ye unfaithful. Psalm 95:7, &c.