Thunder and lightning, which usually go together, are sensible indications of the glory and majesty, the power and terror, of Almighty God, one to the ear and the other to the eye; in these God leaves not himself without witness of his greatness, as, in the rain from heaven and fruitful seasons, he leaves not himself without witness of his goodness (Act 14:17), even to the most stupid and unthinking. Though there are natural causes and useful effects of them, which the philosophers undertake to account for, yet they seem chiefly designed by the Creator to startle and awaken the slumbering world of mankind to the consideration of a God above them. The eye and the ear are the two learning senses; and therefore, though such a circumstance is possible, they say it was never known in fact that any one was born both blind and deaf. By the word of God divine instructions are conveyed to the mind through the ear, by his works through the eye; but, because those ordinary sights and sounds do not duly affect men, God is pleased sometimes to astonish men by the eye with his lightnings and by the ear with his thunder. It is very probable that at this time, when Elihu was speaking, it thundered and lightened, for he speaks of the phenomena as present; and, God being about to speak (Job 38:1), these were, as afterwards on Mount Sinai, the proper prefaces to command attention and awe. Observe here, 1. How Elihu was himself affected, and desired to affect Job, with the appearance of God's glory in the thunder and lightning (Job 37:1, Job 37:2): "For my part," says Elihu, "my heart trembles at it; though I have often heard it, often seen it, yet it is still terrible to me, and makes every joint of me tremble, and my heart beat as if it would move out of its place." Thunder and lightning have been dreadful to the wicked: the emperor Caligula would run into a corner, or under a bed, for fear of them. Those who are very much astonished, we say, are thunder-struck. Even good people think thunder and lightning very awful; and that which makes them the more terrible is the hurt often done by lightning, many having been killed by it. Sodom and Gomorrah were laid in ruins by it. It is a sensible indication of what God could do to this sinful world, and what he will do, at last, by the fire to which it is reserved. Our hearts, like Elihu's should tremble at it for fear of God's judgments, Psa 119:120. He also calls upon Job to attend to it (Job 37:2): Hear attentively the noise of his voice. Perhaps as yet it thundered at a distance, and could not be heard without listening: or rather, Though the thunder will be heard, and whatever we are doing we cannot help attending to it, yet, to apprehend and understand the instructions God thereby gives us, we have need to hear with great attention and application of mind. Thunder is called the voice of the Lord (Psa 29:3, etc.), because by it God speaks to the children of men to fear before him, and it should put us in mind of that mighty word by which the world was at first made, which is called thunder. Psa 104:7, At the voice of thy thunder they hasted away, namely, the waters, when God said, Let them be gathered into one place. Those that are themselves affected with God's greatness should labour to affect others. 2. How he describes them. (1.) Their original, not their second causes, but the first. God directs the thunder, and the lightning is his, Job 37:3. Their production and motion are not from chance, but from the counsel of God and under the direction and dominion of his providence, though to us they seem accidental and ungovernable. (2.) Their extent. The claps of thunder roll under the whole heaven, and are heard far and near; so are the lightnings darted to the ends of the earth; they come out of the one part under heaven and shine to the other, Luk 17:24. Though the same lightning and thunder do not reach to all places, yet they reach to very distant places in a moment, and there is no place but, some time or other, has these alarms from heaven. (3.) Their order. The lightning is first directed, and after it a voice roars, Job 37:4. The flash of fire, and the noise it makes in a watery cloud, are really at the same time; but, because the motion of light is much quicker than that of sound, we see the lightning some time before we hear the thunder, as we see the firing of a great gun at a distance before we hear the report of it. The thunder is here called the voice of God's excellency, because by it he proclaims his transcendent power and greatness. He sends forth his voice and that a mighty voice, Psa 68:33. (4.) Their violence. He will not stay them, that is, he does not need to check them, or hold them back, lest they should grow unruly and out of his power to restrain them, but lets them take their course, says to them, Go, and they go - Come, and they come - Do this, and they do it. He will not stay the rains and showers that usually follow upon the thunder (which he had spoken of, Job 36:27, Job 36:29), so some, but will pour them out upon the earth when his voice is heard. Thunder-showers are sweeping rains, and for them he makes the lightnings, Psa 135:7. (5.) The inference he draws from all this, Job 37:5. Does God thunder thus marvellously with his voice? We must then conclude that his other works are great, and such as we cannot comprehend. From this one instance we may argue to all, that, in the dispensations of his providence, there is that which is too great, too strong, for us to oppose or strive against, and too high, too deep, for us to arraign or quarrel with.

After it a voice roareth - After the flash has been seen, the peal is heard; and this will be more or fewer seconds after the peal, in proportion to the distance of the thunder cloud from the ear. Lightning traverses any space without any perceivable succession of time; nothing seems to be any obstacle to its progress. A multitude of persons taking hands, the first and the last connected with the electric machine, all feel the shock in the same instant; and were there a chain as conductor to go round the globe, the last would feel the shock in the same moment as the first. But as sound depends on the undulations of the air for its propagation, and is known to travel at the rate of only 1142 feet in a second; consequently, if the flash were only 1142 feet from the spectator, it would be seen in one second, or one swing of the pendulum, before the sound could reach the ear, though the clap and the flash take place in the same instant, and if twice this distance, two seconds, and so on. It is of some consequence to know that lightning, at a considerable distance, suppose six or eight seconds of time, is never known to burn, kill or do injury. When the flash and the clap immediately succeed each other, then there is strong ground for apprehension, as the thunder cloud is near. If the thunder cloud be a mile and a half distant, it is, I believe, never known to kill man or beast, or to do any damage to buildings, either by throwing them down or burning them. Now its distance may be easily known by means of a pendulum clock, or watch that has seconds. When the flash is seen, count the seconds till the clap is heard. Then compute: If only one second is counted, then the thunder cloud is within 1142 feet, or about 380 yards; if two seconds, then its distance is 2284 feet, or 761 yards; if three seconds, then 3426 feet, or 1142 yards; if four seconds, then the cloud is distant 4568 feet, or 1522 yards; if five seconds, then the distance is 5710 feet, or 1903 yards; if six seconds, then the distance is 6852 feet, or 2284 yards, one mile and nearly one-third; if seven seconds, then the distance of the cloud is 7994 feet, or 2665 yards, or one mile and a half, and 25 yards. Beyond this distance lightning has not been known to do any damage, the fluid being too much diffused, and partially absorbed, in its passage over electric bodies, i.e., those which are not fully impregnated by the electric matter, and which receive their full charge when they come within the electric attraction of the lightning. For more on the rain produced by thunder storms, see on Job 38:25 (note). This scale may be carried on at pleasure, by adding to the last sum for every second 1142 feet, and reducing to yards and miles as above, allowing 1760 yards to one mile.

He thundereth with the voice of his excellency - גאונו geono, of his majesty: nor is there a sound in nature more descriptive of, or more becoming, the majesty of God, than that of Thunder. We hear the breeze in its rustling, the rain in its pattering, the hail in its rattling, the wind in its hollow howlings, the cataract in its dash, the bull in his bellowing, the lion in his roar; but we hear God, the Almighty, the Omnipresent, in the continuous peal of Thunder! This sound, and this sound only, becomes the majesty of Jehovah.

And he will not stay them - ולא יעקבם velo yeahkebem, and he hath not limited or circumscribed them. His lightnings light the world; literally, the whole world. The electric fluid is diffused through all nature, and everywhere art can exhibit it to view. To his thunder and lightning, therefore, he has assigned no limits. And when his voice soundeth, when the lightning goes forth, who shall assign its limits, and who can stop its progress? It is, like God, Irresistible.

After it a voice roareth,.... After the lightning comes a violent crack or clap of thunder, which is like the roaring of a lion. Such is the order of thunder and lightning, according to our sense and apprehension of them; otherwise in nature they are together: but the reasons given why the lightning is seen before, and so the same in the flash and report of a gun, are, because the sense of seeing is quicker than the sense of hearing (y); and the motion of light is quicker than that of sound; which latter is the truest reason (z). The roaring voice of thunder may be an emblem of the thunder of the law; its dreadful volleys of curses, vengeance, and wrath on the breakers of it, as delivered out by Boanergeses, sons of thunder, Mar 3:17, or the loud proclamation of the Gospel, made by the ministers of it; and the alarming awakening sound of the word, when attended with the Spirit and power of God, to sinners asleep and dead in trespasses and sins; upon which they awake, hear, and live;

he thundereth with the voice of his excellency: that is, God thunders with such a voice, an excellent and majestic one; for his voice of thunder is full of majesty, Psa 29:4. So is the voice of Christ in the Gospel; he spake when on earth as one having authority, and he comes forth and appears in it now with majesty and glory; and speaks in it of the excellent things which he has done, of the excellent righteousness he has wrought out, of the excellent sacrifice he has offered up, and of the excellent salvation he is the author of;

and he will not stay them when his voice is heard; either the thunder and the lightning, as some; which he does not long defer after he has given out the decree concerning them, the order and disposition for them: or rather the rain and hail; these are not stayed, but quickly follow the flash of lightning and clap of thunder: "for when he utters his voice of thunder, there is a multitude of waters in the heavens"; and these quickly come down and are not stopped, Jer 10:13. The word for "stay" signifies "to supplant", or "act deceitfully"; the name of Jacob is derived from this root, because he supplanted his brother, Gen 25:26; and so it may be rendered here, "he will not supplant", or "deceive them (a), when his voice is heard": that is, either he does not subvert them, the heavens and earth, but preserves them; though he makes them to tremble with his voice of thunder (b): or he does not act the part of a secret, subtle, and deceitful enemy, when he thunders; but shows himself openly as a King, executing his decrees with authority (c): or rather he deceives none with his voice; none can mistake it; all know it to be the voice of thunder when it is heard: so Christ's sheep know his voice in the Gospel, and cannot be deceived; the voice of a stranger they will not follow, Joh 10:4.

(y) Senec. Nat. Quaest. l. 2. c. 12. so Aristot. Meteorolog. l. 2. c. 9. (z) The noise is commonly about seven or eight seconds after the flash, that is, about half a quarter of a minute; but sometimes much sooner, in a second or two, or less than so, and almost immediately upon the flash: this is when the explosion is very near us. Philosoph. Transact. abridged, vol. 2. p. 183. see vol. 4. p. 398. (a) "non supplantabit ea", Munster; so Schmidt, Michaelis, Gussetius, p. 633. (b) So Schmidt. (c) So Gussetius.

The thunderclap follows at an interval after the flash.

stay them--He will not hold back the lightnings (Job 37:3), when the thunder is heard [MAURER]. Rather, take "them" as the usual concomitants of thunder, namely, rain and hail [UMBREIT] (Job 40:9).