Freedom and practical reason › The primacy of practical reason

The primacy of practical reason concerns the interests of reason where speculative reason cannot settle the relevant question. It does not license believing any comforting claim. A practical commitment must have the required connection with moral reason, and it cannot overturn a demonstrated contradiction.

This separates practical faith from an unrestricted escape from evidence. Kant maintains limits on theoretical knowledge while arguing that moral reason supplies grounds for particular commitments. The conclusion should be assessed within those limits, rather than translated into a claim that empirical investigation has confirmed God or immortality.

The distinction also preserves the independence of moral motivation. If fear of a divine penalty became the ground of action, it would reintroduce the heteronomy the earlier argument rejected. The postulates concern the rational pursuit of the highest good, not a technique for persuading reluctant people to obey.

The structure can now be seen as a sequence: the law has authority through pure practical reason; consciousness of it warrants freedom; and the highest good leads to the further postulates. Accepting an earlier step does not make every later inference obvious. Each connection has a burden of argument that the reader can examine separately.