This is the proof of the preceding statement that the works of the disbelievers are worthless like ashes. The question implies: Why are you skeptical of this? Do you not see that the grand system of the earth and the heavens is based on the survival of truth and not on the survival of falsehood. Everything bears witness to the fact that anything which is not based on truth and reality but rests on unreal speculation and guess work cannot continue to live long. Therefore anyone who builds his works on the latter will most surely fail in his designs. For it is obvious that such a person builds his works on sand and should not, therefore, expect that they can last long. Likewise those who discard the truth and reality and build their works on false theories and presumptions should not expect at all that they can have any lasting value for they are bound to be scattered like worthless ashes. If this is obvious as it is, why should you cherish any doubts about the fact that anyone who builds the system of his life on the basis that he is independent of Allah or on the godhead of someone else (whereas there is no other God) shall inevitably find all his works to be worthless. When the fact is that man is not absolutely independent in this world nor is he the servant of anyone else than Allah, why should you not expect that anyone who builds his works on this falsehood, shall find that all his works were worthless like the heap of ashes that was scattered all over by the wind?