Act 17:22-31- Men of Athens, I behold that in all things you seem to be more given to the fear of the deities than others are. For instance, while passing along and carefully observing your objects of devotion I also found an altar on which had been inscribed ‘To an Unknown God’. Therefore what you are unknowingly giving godly devotion to, this I am publishing to you. The God that made the world and all the things in it, being, as this One is, Lord of heaven and earth, does not dwell in handmade temples, neither is he attended to by human hands as if he needed anything, because he himself gives to all persons life and breath and all things. And he made out of one man every nation of men, to dwell upon the entire surface of the earth, and he decreed the appointed seasons and the set limits of the dwelling of men, for them to seek God, if they might grope for him and really find him, although, in fact, he is not far off from each one of us.
You can see from here one reason.