24 You have come to Jesus, the one who mediates the new covenant between God and people, and to the sprinkled blood, which speaks of forgiveness instead of crying out for vengeance like the blood of Abel. 25 Be careful that you do not refuse to listen to the One who is speaking. For if the people of Israel did not escape when they refused to listen to Moses, the earthly messenger, we will certainly not escape if we reject the One who speaks to us from heaven! 26 When God spoke from Mount Sinai his voice shook the earth, but now he makes another promise: "Once again I will shake not only the earth but the heavens also." 27 This means that all of creation will be shaken and removed, so that only unshakable things will remain. 28 Since we are receiving a Kingdom that is unshakable, let us be thankful and please God by worshiping him with holy fear and awe. 29 For our God is a devouring fire.
Matthew Henry's Commentary on Hebrews 12:24-29
Commentary on Hebrews 12:18-29
(Read Hebrews 12:18-29)
Mount Sinai, on which the Jewish church state was formed, was a mount such as might be touched, though forbidden to be so, a place that could be felt; so the Mosaic dispensation was much in outward and earthly things. The gospel state is kind and condescending, suited to our weak frame. Under the gospel all may come with boldness to God's presence. But the most holy must despair, if judged by the holy law given from Sinai, without a Saviour. The gospel church is called Mount Zion; there believers have clearer views of heaven, and more heavenly tempers of soul. All the children of God are heirs, and every one has the privileges of the first-born. Let a soul be supposed to join that glorious assembly and church above, that is yet unacquainted with God, still carnally-minded, loving this present world and state of things, looking back to it with a lingering eye, full of pride and guile, filled with lusts; such a soul would seem to have mistaken its way, place, state, and company. It would be uneasy to itself and all about it. Christ is the Mediator of this new covenant, between God and man, to bring them together in this covenant; to keep them together; to plead with God for us, and to plead with us for God; and at length to bring God and his people together in heaven. This covenant is made firm by the blood of Christ sprinkled upon our consciences, as the blood of the sacrifice was sprinkled upon the altar and the victim. This blood of Christ speaks in behalf of sinners; it pleads not for vengeance, but for mercy. See then that you refuse not his gracious call and offered salvation. See that you do not refuse Him who speaketh from heaven, with infinite tenderness and love; for how can those escape, who turn from God in unbelief or apostacy, while he so graciously beseeches them to be reconciled, and to receive his everlasting favour! God's dealing with men under the gospel, in a way of grace, assures us, that he will deal with the despisers of the gospel, in a way of judgment. We cannot worship God acceptably, unless we worship him with reverence and godly fear. Only the grace of God enables us to worship God aright. God is the same just and righteous God under the gospel as under the law. The inheritance of believers is secured to them; and all things pertaining to salvation are freely given in answer to prayer. Let us seek for grace, that we may serve God with reverence and godly fear.