John Trapp on Job 37:3

Verſe 3. He directeth it under the whole Heaven] Heb. He maketh it to go right forward, meaning the thunder, the vehement noiſe or ſound whereof (not altogether unlike that of cloth violently torn, or of air thruſt out of bellows, or of a cheſnut burſt in the fire, but far louder) is brought through the air to our eares with ſuch a mighty force, that it drowns all noiſes, clappings, clatterings, roarings even of many waters; making the earth to ſhake again,Lavat. and all things tremble, non ſecùs quàm ſiquis currum onuſtum per plateam lapidibus ſtratam ducat; And this dreadful noiſe is by God directed to this or that place under the heavens, at his pleaſure. The word rendred (directeth) ſignifieth alſo Beholdeth; whence ſome interpret this text of Gods ſeeing all things under heaven. But the former ſenſe is better.

And his lightning unto the ends of the earth] God commands the lightning to cleave the clouds, and to ſcatter its flames through the world. Lightning is the brightneſſe of a ſhining flame, running through the whole air in a moment, riſing of a ſmall and thin exhalation kindled in a cloud; ſee Pſal. 18.13. The natural end and effect of thunder and lightning is, to clear the air by waſting poyſonous vapours. The ſupernatural is, to ſhew Gods excellent Majeſty and Might, which the Mightieſt muſt acknowledge, Pſal. 29.1, 2. to be his officers about him to make room for him, Pſal. 97.1, 4. to execute his wrath upon his enemies, Exod. 9.23.27. Pſal. 77.18, 19. 1 Sam. 2.10. Iſai. 29.6. and his mercy toward his people for the humbling of them, 1 Sam. 12.18, 19, 20, &c. raiſing them again to an aſſured confidence, Pſal. 29.11, &c. But that God can ſhoot theſe arrows of his ſo far, Mat. 24.27. Pſal. 77.18. & 97.3, 4. and here; yea, and that at the ſame time when it raineth, when one would think that the one ſhould quench the other, Pſal. 135.7. this is a juſt wonder: and Jeremy urgeth it twice, as ſuch, chap. 10.13. & 51.16.