There is something almost shocking in the notion of so chaste a function carrying this Kantian hurlyburly in her womb.
Category: The Principles of Psychology
Metaphysics means nothing but an unusually obstinate effort to think clearly. The fundamental conceptions of psychology are practically very clear to us, but theoretically they are very confused, and one easily makes the obscurest assumptions in this science without realizing, until challenged, what internal difficulties they involve.