This study dealt with an important topic, which is rational issues and their implications for grammarians and the religious text, as it focused on some rational issues that had the upper hand in changing the course of this grammar and changing its direction according to some contemporary researchers claim, and accusing them of the Arabic grammar that it originated in an atmosphere in which some rational and philosophical curricula, and they governed until they became an integral part of the thinking of Arabic scholars, so the grammar related to it as an influenced subordinate rather than an independent and effective. At the same time I discussed the extent of this influence on the understanding of the religious text that was evident in the issue of analogy and its divisions and its causes, and the impact of the two philosophical and legal analysts on it. It has been proven through research that Arabic grammar was not completely affected by these issues as some claimed, but there were some slight repercussions on its methods and methods. By virtue of the general commonalities between the sciences in general. As for its impact on the religious text, the opposite has been proven, as the grammatical analogy in its rational form has been influenced by the measurement of jurists and fundamentalists in a clear and indisputable manner, which reaches the limits of blind imitation, and by following the principles of jurisprudence ,the impact is impact.