In Islam tradition grew in prestige to the point of “eclipsing” that which brought it about in the first place: revelation. The casualties of the elevation of tradition were reason and revelation. The “eclipse” was brought about by three factors, all of which required a shift of focus to accommodate tradition.
The first was the sacralizationof tradition. This entailed the designation of tradition as revelation. Second was the subordination of reason to tradition. This entailed placing the authority of tradition above that of reason. Third was the subordination of the Quranto tradition. This entailed judging revelation by tradition.