Canst thou send lightnings? - That is, lightning is wholly under the control of God. So it is now; for after all that man has done to discover its laws, and to guard against it, yet still man has made no advances toward a power to wield it, nor is it possible that he ever should. It is one of the agencies in the universe that is always to be under the divine direction, and however much man may subsidize to his purposes wind, and water, and steam, and air, yet there can be no prospect that the forked lightning can be seized by human hands and directed by human skill to purposes of utility or destruction among people; compare the notes at Job 36:31-33.
And say unto thee, Here we are - Margin, “Behold us.” That is, we are at your disposal. This language is derived from the condition, of servants presenting themselves at the call of their masters, and saying that they stood ready to obey their commands; compare 1Sa 3:4, 1 Samuel 3:6,1 Samuel 3:9; Isaiah 6:8.