Hence the difference between the laws of a nature to which the will is subject and those of a nature that is subject to a will™ (in regard to what refers the will to its free actions) rests on this: that in the former nature the objects must be causes of the presentations that determine the will, but in the latter nature the will is to be the cause of the objects, so that the will's causality has its determining basis solely in the pure power of reason, a power that can therefore also be called a pure practical reason.