What is our duty in this world? To enjoy everything randomly or?

As I discussed earlier, we are used to seek a purpose in anything, and I concluded that we must have a goal in this life.

As another point in that regard, I will try to compare mankind with animals to see whether there is similarity in duty. As we know animals just eat, procreate and enjoy as much as they can. We all know that there is a huge difference between mankind and animals in terms of faculties and many other aspects. That must indicate us something with regard to duty. Lets see what this excerpt has to say:

Belief makes man into man, indeed, it makes man into a king. Since this is so, man's basic duty is belief and supplication. Unbelief makes him into an extremely impotent beast.Out of thousands of proofs of this matter, the differences in the ways animals and man come into the world are a clear indication and decisive proof. Yes, these differences show that humanity becomes humanity through belief. For when animals come into the world, they come complete in all points in accordance with their abilities as though having been perfected in another world; that is, they are sent. They learn all the conditions of their lives, their relationships with the universe, and the laws of life in either two hours or two days or two months, and become proficient in them. Animals like sparrows and bees acquire in twenty days the power to survive and proficiency in their actions that man only acquires in twenty years; that is, they are inspired with them. This means that the animals' fundamental duty is not to be perfected through learning and progress by acquiring knowledge, nor to seek help and offer supplications through displaying their impotence, but in accordance with their abilities to work and act. Their duty is active worship.

As the passage illustrates perfectly, animals do not have a duty to study and learn the ways to survive as we do. They have already been programmed to do so as they come into this world. So, human beings cannot be compared to animals in terms of living.  The idea that spending life like a beast would do is not rational then given these points. 

 (Photo from: http://www.pbase.com)

Unlike animals, we come into this world totally unlearned. We learn things in quite a lot time. We don't get full knowledge of ourselves till puberty. This means that man's innate duty is to be perfected through learning and seek answer to the questions of "Why am I here, who brought me and where will I go?". And this must lead him to His creator who is the one who gave purpose and providence for him. Curiousity requires learning. As one learns about someone great, he believes and admires Him. The Creator is really deserves admiration which also necessitates worship as He is the one who gave us everything we have/will have.

For many aspects of belief, go to this article: http://www.nur.gen.tr/en.html#leftmenu=Risale&maincontent=Risale&islem=read&BolumId=8519&KitapId=456&KitapAd=The+Words