Critique of Judgement by Immanuel Kant Chapter 91 Page 12

its final purpose, so far as it is not altogether in our own power, is only assumed on behalf of the practical use of Reason, and therefore is not so practically necessary as duty itself.

Faith (as habitus, not as actus) is the moral attitude of Reason as to belief in that which is unattainable by theoretical cognition.

It is therefore the constant principle of the mind, to assume as true, on account of the obligation in reference to it, that which it is necessary to presuppose as condition of the possibility of the highest moral final purpose; although its possibility or impossibility be alike impos