Thus it has come about that no moral, social or political question is adequately discussed in Germany until the matter in hand has been properly deduced from an exhaustive determination of its fundamental _Begriff_ or _Wesen_. Or if the material is too obviously empirical to allow of such deduction, it must at least be placed under its appropriate rational form. What a convenience, what a resource, nay, what a weapon is the Kantian distinction of _a priori_ rational form and _a posteriori_ empirical matter. Let the latter be as brutely diversified, as chaotic as you please. There always exists a form of unity under which it may be brought. If the empirical facts are recalcitrant, so much the worse for them. It only shows how empirical they are. To put them under a rational form is but to subdue their irrational opposition to reason, or to invade their lukewarm neutrality. Any violence done them is more than indemnified by the favor of bringing them under the sway of _a priori_ reason, the incarnation of the Absolute on earth. Yet there are certain disadvantages attached to _a priori_ categories. They have a certain rigidity, appalling to those who have not learned to identify stiffness with force. Empirical matters are subject to revision. The strongest belief that claims the support of experience is subject to modification when experience testifies against it. But an _a priori_ conception is not open to adverse evidence. There is no court having jurisdiction. If, then, an unfortunate mortal should happen to be imposed upon so that he was led to regard a prejudice or predilection as an _a priori_ truth, contrary experience would have a tendency to make him the more obstinate in his belief. History proves what a dangerous thing it has been for men, when they try to impose their will upon other men, to think of themselves as special instruments and organs of Deity. The danger is equally great when an _a priori_ Reason is substituted for a Divine Providence. Empirically grounded truths do not have a wide scope; they do not inspire such violent loyalty to themselves as ideas supposed to proceed directly from reason itself. But they are discussable; they have a humane and social quality, while truths of pure reason have a paradoxical way, in the end, of escaping from the arbitrament of reasoning. They evade the logic of experience, only to become, in the phrase of a recent writer, the spoil of a "logic of fanaticism." Weapons forged in the smithy of the Absolute become brutal and cruel when confronted by merely human resistance.