Job 39:1 asks, Knowest thou the time when the wild goats of the rock bring forth? or canst thou mark when the hinds do calve?  I know that it is possible to know about when a tame goat that is expecting will deliver, but God was asking Job about all the wild goats and deer.  Job could not know, but God did.  Verse two asks, Canst thou number the months that they fulfil? or knowest thou the time when they bring forth?  This is a continuation of the question in the last verse.  We may have an overall knowledge of the time it takes for an animal to give birth, but even then we cannot guarantee that the birth will occur at a precise moment, but God knows.  I believe that God was simply pointing out the superiority of His knowledge compared  to Job's.  Verse three says, They bow themselves, they bring forth their young ones, they cast out their sorrows.  God said that the wild animals did not need people in order to have their babies successfully, but they did need God.  Verse four says, Their young ones are in good liking, they grow up with corn; they go forth, and return not unto them.  After the birth and nurturing of the babies, the babies grow to maturity without the help of any person.  This could be a good example for people, that children should be reared to become independent from their parents.  I believe that God was telling Job that He was in control of everything without needing any help from people, who are His creation.  Even the wild goats were a testimony to God's sustaining power.  Verse five asks, Who hath sent out the wild ass free? or who hath loosed the bands of the wild ass?  Matthew Henry says that the wild ass was often seen as free from all responsibility.  God said that He was the One Who had set them free.  We might ask what purpose they have, but instead we should simply accept that this is a part of God's plan.  Verse six says, Whose house I have made the wilderness, and the barren land his dwellings.  The wild ass was set free in the wilderness.  They could live on nearly barren land.  Verse seven says, He scorneth the multitude of the city, neither regardeth he the crying of the driver.  I believe that these two verses speak of being free without any nurturing versus being tamed and cared for.  If we put our faith in God, we are no longer free to simply do what we want to do, but must put our lives under the leadership of God.   Verse eight says, The range of the mountains is his pasture, and he searcheth after every green thing.  The wild ass is free to wander everywhere, but must search for its own food.  If we wander free from God's leadership, then we should not be surprised if we have to provide for our own spiritual care.  We may succeed materially, but we will fail spiritually.  Verse nine asks, Will the unicorn be willing to serve thee, or abide by thy crib?   We may not really know what the animal called the unicorn is, but Matthew Henry says that it is a wild untameable beast.  There are certain animals that cannot be domesticated enough to be trusted to do what we want them to.  There are some people who refuse to follow God, and therefore cannot be trusted to do His will.  Verse ten asks,  Canst thou bind the unicorn with his band in the furrow? or will he harrow the valleys after thee?  Then verse eleven says, Wilt thou trust him, because his strength is great? or wilt thou leave thy labour to him?  As just stated, I believe that God was asking Job if he could trust the unicorn, or wild and untameable beast to plow crops.  Verse twelve asks, Wilt thou believe him, that he will bring home thy seed, and gather it into thy barn?  I believe that God was asking if He could trust those who refused to follow Him no matter what if they could be trusted with accomplishing His will for their lives.  We must put God first in every aspect of our lives if we are going to be successful in following Him and accomplishing His purpose in our lives.