Allah Is Known Through Reason

How do we know the existence of Allah?
How is it possible to think that the balance in the world came about by coincidence when the extraordinary harmony of nature is observable even with the naked eye? It is the most unreasonable claim to say that the universe, each point of which suggests the existence of its Creator, has come into being on its own.
Therefore, there should be an owner of the balance visible everywhere from our body to the farthest corners of the inconceivably vast universe....