Only then, insofar as reason by itself determines the will (instead of being in the service of the inclinations), is reason a true higher power of desire, to which the pathologically determinable power of desire is subordinate, and only then is reason actually distinct indeed, distinct in ki from the latter power, so that even the slightest admixture of the latter power's impulses impai reason's fortitude and superiority, just as the slightest empirical component as condition in a mathematical demonstration degrades and annihilates the demonstration's dignity and force.