Job 41:4

The leviathan has generally been identified with the crocodile. Like the behemoth, the leviathan is a strong and untamable beast. Jehovah asks, Can you draw up leviathan with a hook? Can you pierce his jaw with a reed? Will he make a covenant with you? Will you take him for a servant forever? Then He declares that he is fierce, and even at the sight of him one is cast down. And if a creature is so mighty and strong, what must the One be who called this creature into existence?

But suppose he is caught. Is he soft and yielding, ready to serve forever? Can you play with him as you would with a bird or a deer, a toy for girls? No, he is no commodity for traders, no game for the hunter, no safe opponent in battle. The very sight of him might knock a man flat, and the man who would provoke him is reckless. Yet what is that compared with standing before God? Who has ever given anything to Him that He should repay it, when all under heaven is His?

Could Job persuade him to respond softly to him in order to bring about his submission? (v.4). The very appearance of the crocodile is hostile and intimidating. He would certainly never be tamed to engage in play like some birds or animals, and certainly not as a pet for girls! (v.5).

Men talk as if God's object was merely to occupy us with His works. God, on the contrary, brings forward His works to turn us away from our own thoughts and bow us to Himself. For if the works of God are so wonderful, who is He that made them, and what is man if he dares to judge such a God?

God now shows Job, under the figure of leviathan, that the power of Satan is too great for him. What a terrible one he is — this king over all the children of pride! This world has rejected the King of Righteousness. It has preferred the horrible slavery of Satan. But what could be God's object in describing the power of the adversary like this? Surely it was to lead Job into complete dependence on Him.

But let us remember it is God who made this beast: who then could possibly stand against God? This shows the fearful, untamable character of leviathan, as wild and unapproachable as behemoth, and it reminds us of the first beast of Revelation 13, the beast who rises out of the sea. … This Beast, along with the Antichrist, will form a powerful union of such strength that they will not be afraid to challenge their own Creator! While no man can stand before them, however, the Lord will bring them down to a crushing, humiliating defeat.

"I have heard of you by the hearing of the ear, but now my eye sees you." It was nothing external now, no mere distant rumour. … Do you think that searching into the structure or habits of behemoth and leviathan would have led to anything of the sort? Certainly not. He had to do with God Himself, who used them for this very purpose, and had by them turned Job away from everything to Himself.