what the qur'an itself says concerning this matter

Scholars who explain the power of revelation and prophecy using the above explanation, attach great importance to the Science of nature and the visible world, and claim that everything in the world works according to the laws of nature. They view historical events, right up to the present-day, as the developing and constantly changing face of nature.
Likewise, they view all revealed religions as social manifestations. Thus they would agree that if one of the geniuses of history, like Cyrus, Darius or Alexander, had announced himself as having been chosen by God as an executor of divine commands, their explanation would have been no different than that given above.
We do not intend here to establish the existence of the unseen, of the world beyond the visible world of nature; we are not saying to other scholars or scientists that any one science may only be discussed by remaining within the strict limits of that particular science. We are not suggesting that the modern sciences which investigate the properties and effects of the material world, (whether or not they be positively or negatively disposed to the creation), do not have the right to enter into an investigation of the metaphysical.
What we are saying is that any explanation they propose must be in accordance with the explanation of society, existence, nature and the cosmos given by the Qur'an. The Qur'an is an authentic document of prophecy and is the basis Of all social, metaphysical and scientific discussion; the explanation Of the Qur'an contain proofs against their arguments which we can enumerate and reflect upon. These proofs are connected to different Qur'anic verses discussed below.