"In any case, Jaspers 'insistence, contra Kant and the neo-Kantians, that reason itself is not the sole source of knowledge, and that the task of reason is not proscriptively to circumscribe the sphere of its validity against transcendence, but to overcome its cognitive limits and to envision contents which cannot be generated by its own autonomous functions, deserves to be rehabilitated as an abidingly significant contribution to modern debates on metaphysics and epistemology."