Job 39:13 asks, Gavest thou the goodly wings unto the peacocks? or wings and feathers unto the ostrich?  God continues to ask Job about the nature and even the care of other creatures.  He asks about the peacock and the ostrich.  The peacock struts around in its beauty, but is really of little use to people.  When people start to strut around, more worried about the way they look than how they may help others, they are of little value to God.  Verse fourteen says, Which leaveth her eggs in the earth, and warmeth them in dust,  The ostrich is not a nesting, caring bird.  She lays her eggs wherever she happens to be and leaves them.  Verse fifteen states, And forgetteth that the foot may crush them, or that the wild beast may break them.  The ostrich is not concerned about what might happen to her eggs.  Verse sixteen says, She is hardened against her young ones, as though they were not hers: her labour is in vain without fear;  The question is what did this mean to Job, and therefore to us.  I believe that God was saying that just as He sustained the ostrich in spite of her carelessness with her eggs, that He likewise sustained even those who refused to live by His will.  We might think, as Job was claiming, that God would allow those who did not follow Him to simply pass out of existence, but God sustains the life of even those who refuse to acknowledge Him, at least in this life.  Verse seventeen says, Because God hath deprived her of wisdom, neither hath he imparted to her understanding.  The ostrich acts the way that it does because it lacks the knowledge to do otherwise.  I believe that God was saying that when people live absorbed by their own desires that they do so because they lack an understanding of God's will for their lives.  Verse eighteen says, What time she lifteth up herself on high, she scorneth the horse and his rider.  The ostrich and peacock may strut around proudly and ignore the horse, who is serving a purpose, but that does not make them more important.  I believe that God was reminding Job that prosperity does not mean that a person is following God.  God expects more from His people than just vain glory.  Verse nineteen asks, Hast thou given the horse strength? hast thou clothed his neck with thunder?  It may seem that God was asking Job basically the same question over and over, and that was if Job had the ability to sustain all life.  Since Job had at length professed that God was being unfair to Him, I believe that God was just reminding Job that he did not have the power nor the ability to question God.  Verse twenty asks, Canst thou make him afraid as a grasshopper? the glory of his nostrils is terrible.  Job could not change the nature of nature of horses, because God had made them as they are, so why did Job feel that he could question God.  In the next five verses God continues to ask Job about the nature of horses.  Verse twenty-one says, He paweth in the valley, and rejoiceth in his strength: he goeth on to meet the armed men.  Then verse twenty-two states, He mocketh at fear, and is not affrighted; neither turneth he back from the sword.  Verse twenty-three says, The quiver rattleth against him, the glittering spear and the shield.  Then verse twenty-four continues, He swalloweth the ground with fierceness and rage: neither believeth he that it is the sound of the trumpet. Finally verse twenty-five concludes, He saith among the trumpets, Ha, ha; and he smelleth the battle afar off, the thunder of the captains, and the shouting.  I believe that God was saying that among other things that the horse is powerful and mighty, but lacks the ability to reason.  A horse will change into battle, but will also shy away from unexpected movements, like a grasshopper.  People should have the ability to stand strong in their relationship to God through small problems or war itself.  In the rest of the chapter, God asks Job about hawks and eagles.  Verse twenty-six asks, Doth the hawk fly by thy wisdom, and stretch her wings toward the south?  Then verse twenty-seven asks, Doth the eagle mount up at thy command, and make her nest on high?  Verse twenty-eight states, She dwelleth and abideth on the rock, upon the crag of the rock, and the strong place. Then verse twenty-nine says, From thence she seeketh the prey, and her eyes behold afar off.  Verse thirty concludes, Her young ones also suck up blood: and where the slain are, there is she.  I believe that these questions and statements about hawks and eagles were just reminders to Job that God was the Creator and Sustainer of the universe.  If Job could not answer God's questions about why creation is as it is, then why should he feel free to question God in the way that he was treated.  If we truly follow God, and the world seems to collapse around us, we can never feel that God is the cause of the problems or that He will not deliver us from them.  We need to simply remain true to God.