Verse 29. For our God is a consuming fire. This is a further reason why we should serve God with profound reverence and unwavering fidelity. The quotation is made from De 4:24: "For the Lord thy God is a consuming fire, even a jealous God." The object of the apostle here seems to be, to show that there was the same reason for fearing the displeasure of God under the new dispensation which there was under the old. It was the same God who was served. There had been no change in his attributes, or in the principles of his government. He was.no more the friend of sin now than he was then; and the same perfections of his nature which would then lead him to punish transgression would also lead him to do it now. His anger was really as terrible, and as much to be dreaded, as it was at Mount Sinai; and the destruction which he would inflict on his foes would be as terrible now as it was then. The fearfulness with which he would come forth to destroy the wicked might be compared to a fire that consumed all before it. See Barnes "Mr 9:44-46".

The image here is a most fearful one, and is in accordance with all the representations of God in the Bible, and with all that we see in the Divine dealings with wicked men, that punishment, as inflicted by him, is awful and overwhelming. So it was on the old world; on the cities of the plain; on the hosts of Sennacherib; and on Jerusalem; -- and so it has been in the calamities of pestilence, war, flood, and famine, with which God has visited guilty men. By all these tender and solemn considerations, therefore, the apostle urges the friends of God to perseverance and fidelity in his service. His goodness and mercy; the gift of a Saviour to redeem us; the revelation of a glorious world; the assurance that all may soon be united in fellowship with the angels and the redeemed; the certainty that the kingdom of the Saviour is established on a permanent basis, and the apprehension of the dreadful wrath of God against the guilty, all should lead us to persevere in the duties of our Christian calling, and to avoid those things which would jeopard the eternal interests of our souls.

{a} "our God" De 4:24