The concept of a will, however, already contains the concept of causality, and hence the concept of a pure will already contains the concept of a causality with freedom.e., a causality that is not determinable according to laws of nature and consequently not capable of any empirical intuition as proof of its reality, but that nonetheless complete justifies its objective reality a priori in the pure practical law, though (as one can easily for the sake not of the theoretical but merely of the practical use of reason.