vision that constitutes man’s cognitive belief about this existence. The aim of this study is to offer a view on positive methodological behavior in the process of building the doctrinal system by making use of all cognitive tools, and to make the most use of its data in proving the existential realities, and provide a real discussion of the contradiction between them. We also try, in this study, to get to a clear vision in making the cognitive tools integrative and not destructive, through the reference to their only authentic source, which is reason; the absolute scientific perceptual dominating tool in all levels of thought.