Cartesianism – perhaps the most intelligent way of being unintelligent – is the classic example of a faith which has become the dupe of the gropings of reasoning; this is a “wisdom from below” and history shows it to be deadly. The whole of modern philosophy, including science, starts from a false conception of intelligence; for instance, the modern cult of “life” sins in the sense that it seeks the explanation and goal of man at a level below him, in something which could not serve to define the human creature. But in a much more general way, all rationalism – whether direct or indirect – is false from the sole fact that it limits the intelligence to reason or intellection to logic, or in other words cause to effect. [GTUFS: UIslam, The Path]