Full Idea
All interest of my reason (the speculative as well as the practical) is united in the following three questions: 1) What can I know?, 2) What should I do?, and 3) What may I hope?
Gist of Idea
Reason is only interested in knowledge, actions and hopes
Source
Immanuel Kant (Critique of Pure Reason [1781], B833/A805)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.677
A Reaction
Maybe reason is also interested in itself. And presumably it doesn't lose interest in what is clearly unknowable, or unachievable, or beyond all hope?