NOTES for Job 39:19
To a person standing on the ground, a war horse looks like an indestructible monster. Of course, skilled riders have often mastered horses, but here the point is something quite different: it was not you, man, who gave the horse strength; you are not the source of what you habitually use throughout your life. Man is used to taking pride in his many inventions, but everything he has created is based on the use of natural forces and patterns created by God. Man created devices that allowed him, after the birds, to rise above the earth, but the birds themselves, created by God, need no technical devices in order to fly.