Full Idea
Geometry is grounded on the pure intuition of space.
Gist of Idea
Geometry rests on our intuition of space
Source
Immanuel Kant (Prolegomena to Any Future Metaphysic [1781], 284)
Book Reference
Kant,Immanuel: 'Prolegomena to Any Future Metaphysic', ed/tr. Lucas,Peter G. [Manchester UP 1971], p.39
A Reaction
I have the impression that recent thinkers are coming round to this idea, having attempted purely algebraic or logical accounts of geometry.