I appreciate your creativity there, but no matter how hard you try to spin it, 8 and Fi are not similar. That's a fact!
I was not trying to say they are close to the same thing. I was saying their relation is the same as the relation between 8 and Te, for the most part. As a fellow ENP I'd urge you to check your sources for "facts" on a daily basis

There are no facts concerning this that I know of.
But if this is what you are associating 8 with, that sort of makes it sound like it is just from a person's situation, and not really a fundamental type.
My style of communication often times comes bitting me on my arse....I stayed away from direct definitions because I'm not claiming I know how Fi and 8 (or any two other enneagram/MBTI concepts for that matter) relate to each other
specifically only that they clearly do. This only makes sense if one understands we are no just our enneagram number and wing, but are affected by the whole circle; also, the enneagram tells us we can move in that circle.
The more I investigate psychology the more I'm inclined to stay away from nature/nurture debates. It's mostly a moot point since I'm not claiming anything regarding what came first anyway.
I don't think enneagram is merely nature OR nurture. Even if I have a predisposition from birth to be a certain way, my life experiences may satisfy my special needs favorably and thus my enneagram test results might still be slightly skewed. Not to mention one is even
recommended to grow. As a 9 I hope in a few years time my 3 scores are much higher since that would mean I'm moving in my direction of integration. Integration being a keyword here people since that is the enneagram's "aim".
I'm not trying to make a direct correlation between Fi and 8 per se.....my view is that the gut instinct, Fi and Te, the need to withdraw or assert one's presence in the environment AS WELL as the fundamental needs for peace/love (9) and truth/strength (8) of the individual might all be interdependent. These matters are all related to the same "energies"/impulses if you will so that if you affect one of them you also affect the other. Let's not forget these systems are here for us to MAP reality, but are not reality in themselves. As ever, the map is not territory.
Also I'd like to add, to whom it may concern, that in the light of new data or experience words like
spiritualism and
mysticism (and
the inventors of these models are no strangers to those) lose their "la-la" weight. The new religion of the ages is science, and anything even sounding in any way less scientific is deemed heresy and taboo. But there are reasons people like Jung investigated certain topics. This is not the same thing as saying that mysticism is suddenly a source of truth.
The point is that someone studying psychology with any degree of sincerity has to open himself up to all sorts philosophical questions. The study of the human psyche is the study of our reality as well. And to do that one must be
open-minded. Something is only hocus-pocus insofar as we predefine it as such. What do the words
religion,
spiritual and
msytical mean to any one of us? For a long time they held negative, wishy-washy meanings for me. Nowadays they have no more such weight for the most part. And I'm not more religious, spiritual or mystical for it. Also anyone who worships science (since science is but one of men's many gods throughout history) should do well to ponder on history's greatest geniuses and their philosophies and worldviews and inquire into them.