6. That is to say, the entire system of the earth and the heavens is a witness to the truth of the doctrine of Tauhid and to the negation of shirk. You may look at anything in the universe and consider the system from any point of view you like, you will find proof of this fact that it is being run by one God and not by many gods. Then how is it that you believe in shirk when there is no proof whatsoever of this in the universe As a fitting sequence of this, proofs of Tauhid and refutation of shirk have been given from man himself and from other signs in the universe, and it has also been shown that Prophethood is based on truth.