Not only our moral life, but even our use of theoretical reason - on which we rely in rationally inquiring into nature - presupposes that we are free.

Kant considers belief in God and immortality to be items of "faith" because he relates faith to the pursuit of ends - in this case, the highest good.

Those who employ their modest talents as best they can do make a contribution to a better human future.

What I most fear now is that within a century or so there may not be any human future at all.

It is actually a nice question how far Descartes himself endorses the monological and metaphysically dualistic theory of mind associated with his name and his legacy in early modern philosophy. But Fichte does reject this tradition, by suggesting that an immaterial thinking substance is an incoherent notion, and a rational being whose rationality was not developed through communication with others is a transcendental impossibility.

Freedom is an unprovable but unavoidable presupposition, not an article of faith.

We can treat human responses to cognitions as involving law-like connections grounded on free choices which show themselves in our character.