Human nature in itself provides us with a strong inclination towards a belief in God. There are certain sins which human nature doesn't like to get involved in. For instance, relationship with Mother, sister and daughters, uncleanliness owing to certain discharges from body. These are certain things which even a atheist will not like to do. But if there is no fear of a super being, Why not to lie all the times?, why not to steal and commit adultery? What are the reasons that keep them away from these evils? If they do not feel the power of some unseen, then they should do whatever pleases them. Then truth and lie and justice and oppression should be all the same for them. Its only God's fear that is ruling on their hearts. Although their mind does not acknowledge the existence of God but the human nature created by God cannot defy it. So even an atheist at heart holds some view about God and judgment day. While in distress, everybody pray to a super-Being for relief. Why so, if they don't believe in that super-being, whom we call God?
If we deeply study this universe, we see that every thing culminates in a Creator. He is the ultimate and every thing is working under his guidance. If we look at different stages of human birth and growth, we see that as we go backward, we find we are moving towards weaker and weaker stage. Eventually we shall find that the growth starts from a clot of clinging substance. So human beings who themselves start from such a weak stage, how can they be their own creator. So it proves without any doubt that human beings are not their own creator. We see that if we start studying the birth process minutely, ultimately we will find ourselves at the limit of human knowledge. At that stage, all the worldly knowledges will reach their limit and will be totally exhausted about what had actually happened? So that is a stage where divine hand is working. Every scientist have to believe that all the processes of this universe ultimately reaches a point where their knowledge becomes inadequate or insufficient to describe them. Once somebody asked a bedouin that what proof does he has about the existence of God. He replied that if he saw excrement of a camel in the middle of a jungle, he could tell that a camel had passed through that jungle. Then after seeing so many different creatures in this universe, couldn't he tell that there is some creator of them?