15 "Look at Behemoth, which I made along with you and which feeds on grass like an ox.
34 It looks down on all that are haughty; it is king over all that are proud."
The description of the Leviathan, is yet further to convince Job of his own weakness, and of God's almighty power. Whether this Leviathan be a whale or a crocodile, is disputed. The Lord, having showed Job how unable he was to deal with the Leviathan, sets forth his own power in that mighty creature. If such language describes the terrible force of Leviathan, what words can express the power of God's wrath? Under a humbling sense of our own vileness, let us revere the Divine Majesty; take and fill our allotted place, cease from our own wisdom, and give all glory to our gracious God and Saviour. Remembering from whom every good gift cometh, and for what end it was given, let us walk humbly with the Lord.
Matthew Henry's Commentary on Job 40:15
Commentary on Job 40:15-24
(Read Job 40:15-24)
God, for the further proving of his own power, describes two vast animals, far exceeding man in bulk and strength. Behemoth signifies beasts. Most understand it of an animal well known in Egypt, called the river-horse, or hippopotamus. This vast animal is noticed as an argument to humble ourselves before the great God; for he created this vast animal, which is so fearfully and wonderfully made. Whatever strength this or any other creature has, it is derived from God. He that made the soul of man, knows all the ways to it, and can make the sword of justice, his wrath, to approach and touch it. Every godly man has spiritual weapons, the whole armour of God, to resist, yea, to overcome the tempter, that his never-dying soul may be safe, whatever becomes of his frail flesh and mortal body.