What has once been settled by a precedent will not be unsettled overnight, for certainty and uniformity are gains not lightly sacrificed. Above all is this true when honest men have shaped their conduct on the faith of the pronouncement.
The above observation makes the hypothesis advanced by those who see Muhammad as the author of the Qur'an untenable. How could a man, from being illiterate, become the most important author, in terms of literary merits, in the whole of Arabic literature? How could he then pronounce truths of a scientific nature that no other human being could possibly have developed at that time, and all this without once making the slightest error in his pronouncement on the subject?"