„By speaking of space as an Idea, I intend to imply... that the apprehension of objects as existing in space, and of the relations of position, &c., prevailing among them, is not a consequence of experience, but a result of a peculiar constitution and activity of the mind, which is independent of all experience in its origin, though constantly combined with experience in its exercise.“
— William Whewell
Part 1, Book 2, ch. 2, art. 1.