Full Idea
For Kant, theoretical reason, like practical reason, seeks the unconditioned: it keeps asking why until explanation is complete.
Gist of Idea
Reason keeps asking why until explanation is complete
Source
report of Immanuel Kant (Critique of Pure Reason [1781]) by Christine M. Korsgaard - Aristotle and Kant on the Source of Value 8 'Kant'
Book Reference
Korsgaard,Christine M.: 'Creating the Kingdom of Ends' [CUP 1996], p.241
A Reaction
I love this idea. It is so important in philosophy of science, because some theorists say we should give up before our explanations are complete.