Because both istp and isfp need inspiration and new potential or new adventure/horizon to encourage movement. Ne is just that type because they look for that and talk about their experiences too. I knew of an istp who was married to an estj . Out of boredom he would make sudden spontaneous decision to take off on a long drive to Vegas. The vital tonus of the two ip types decreases without Ne. To get my ex out of semi down moods I used my Ne and made him feel excited about new venture in businesses. He's a multimillionaire now. I used to say things like "this opportunity will be great for you because you won't have the overhead cost association with the business and you can have multiple stations..." This awoke in him the need for action and he took it becoming very active and motivated to make money.
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Dual type(as per tcaudilllg)
Enneagram 2w1sw(1w9) helps others to live up to their own standards of what a good person is and is very behind the scenes in the process.
Tritype 1-2-6 stacking sp/sx
I'm constantly looking to align the real with the ideal.I've been more oriented toward being overly idealistic by expecting the real to match the ideal. My thinking side is dominent. The result is that sometimes I can be overly impersonal or self-centered in my approach, not being understanding of others in the process and simply thinking "you should do this" or "everyone should follor this rule"..."regardless of how they feel or where they're coming from"which just isn't a good attitude to have. It is a way, though, to give oneself an artificial sense of self-justification. LSE
Best description of functions:
http://socionicsstudy.blogspot.com/2...functions.html