II. The notice he took of the firmament above over the heads of the living creatures. When he saw the living creatures moving, and the wheels by them, he looked up, as it is proper for us to do when we observe the various motions of providence in this lower world; looking up, he saw the firmament stretched forth over the heads of the living creatures, v. 22. What is done on earth is done under the heaven (as the scripture often speaks), under its inspection and influence. Observe, 1. What he saw: The firmament was as the colour of the terrible crystal, truly glorious, but terribly so; the vastness and brightness of it put the prophet into an amazement and struck him with an awful reverence. The terrible ice, or frost (so it may be read), the colour of snow congealed, or as mountains of ice in the northern seas, which are very frightful. Daring sinners ask, Can God judge through the dark cloud? Job xxii. 13. But that which we take to be a dark cloud is to him transparent as crystal, through which, from the place of his habitation, he looks upon all the inhabitants of the earth, Ps. xxxiii. 14. Under the firmament he saw the wings of the living creatures erect, v. 23. When they pleased they used them either for flight or for covering. God is on high, above the firmament; the angels are under the firmament, which denotes their subjection to God's dominion and their readiness to fly on his errands in the open firmament of heaven, and to serve him unanimously. 2. What he heard. (1.) He heard the noise of the angels' wings, v. 24. Bees and other insects make a great noise with the vibration of their wings; here the angels do so, to awaken the attention of the prophet to that which God was about to say to him from the firmament, v. 25. Angels, by the providences they are employed in, sound God's alarms to the children of men and stir them up to hear his voice; for that is it that cries in the city and is heard and understood by the men of wisdom. The noise of their wings was loud and terrible, as the noise of great waters (like the rout or roaring of the sea), and as the noise of a host, the noise of war; but it was articulate and intelligible, and did not give an uncertain sound; for it was the voice of speech; nay, it was as the voice of the Almighty, for God, by his providences, speaks once, yea, twice, if we could by perceive it, Job xxxiii. 14. The Lord's voice cries, Mic. vi. 9. (2.) He heard a voice from the firmament, from him that sits upon the throne there, v. 25. When the angels moved they made a noise with their wings; but, when with that they had roused a careless world, they stood still, and let down their wings, that there might be a profound silence, and so God's voice might be the better heard. The voice of Providence is designed to open men's ears to the voice of the word, to do the office of the crier, who with a loud voice charges silence while the judge passes sentence. He that has ears to hear, let him hear. Note, Noises on earth should awaken our attention to the voice from the firmament; for how shall we escape if we turn away from him that speaks from heaven!