Full Idea
We cannot possibly conceive of a reason as being consciously directed from outside in regard to its judgements.
Gist of Idea
We cannot conceive of reason as being externally controlled
Source
Immanuel Kant (Groundwork of the Metaphysic of Morals [1785], 448.101)
Book Reference
Kant,Immanuel: 'The Moral Law (Groundwork of Morals)', ed/tr. Paton,H.J. [Hutchinson 1948], p.109