The Reader may share with the Author a feeling of discontent at this point, attempting to reconcile the formal intentions of this inquiry with the cardinal contentions of experience. Let me try to express the difficulty in the form of a question:
What is the bond between form and content in experience, between the abstract formal categories and the concrete material contents residing in experience?
I have no more than a tentative way of approaching the question. I take there to be a primitive category of “form‑in‑experience” — I don’t have a handy name for it yet but it looks to have a flexible nature which from the standpoint of a given agent easily passes from the “structure of experience” to the “experience of structure”.
My personal definition of mathematical understanding has long been expressed in the chiasmatic figure of speech: “the form of experience and the experience of form”. This is not the place to argue for the virtues of this concept, but I thought it would clarify a few points to share it here.