Your assertion that first cause is not possible is not at all self evident. If every cause we observe has something prior to it there are two possibilities: the first cause which began the cascade is unobservable OR the first cause does not exist.

Either postulate explains the phenomena and neither is proveable, nor is either disprovable. Good thing we are not talking science here.

It is also possible that in calling Infinite Intelligence the "first" cause, Napoleon Hill was not speaking chronologically but in order of magnitudes or seniority, philosophically.

A