i love infjs. i view they are the best "feeler" type.
Not only is fe better then fi (emo) but thier 3rd function is Ti (the best function XD). My INFJ is one of the smartest people i know. and i believe that she is
way wiser then alot of Ts i met. Brilliant revolutionists and people were infjs such as Martin Luther King Jr, Dr. Phil (i think he's one), my best friend and my therapist XD...
and the J doesn't make them closed-minded at all, like alot of the other j's I met... and in fact, the INFJ combination of traits is one of the best combinations i've seen. INFJs are
brilliant but kind and revolutionary!
edit-
and sorry if i'm putting down other types... i'm tired (that's a good enough excuse... i guess...) and sorry if i seemed freaky but...

i'm in a weird mood for i just realised to the extent of which infj's are cool... Even though i got
Einstien's type or whatever,
Martin Luther cared more, sacrificed more and tried harder... i view that as
more beautiful then some smart prodigy. (but yet that is my opinion)... and you are cool too brit o.o... and adam sandler (why not)... i'll throw you in there...
(WOW... i just realised what this topic is about- "the Fi effect". pff... STFU BlueWing, god damn.)
The Fi effect is akin to the Fe following Ni to the realm of Introversion. This is where the INFJ is much distinct from the EFJ types. For this reason we often see INFJs write poetry and novels, and discern emotion in depth--much like the aforementioned INFPs(in my INFP profile---Kierkegaard, Virgil, Shakespeare)--Representatives of the INFJ type would be Goethe, Dostoevksy and Camus.
No doubt the EFJs, especially ENFJs have the ability to write poetry and novels (discern the human element in depth like the INFs do) however, because their F is aimed at outwards (more at activity rather than contemplation) they are less likely to engage in such activities.
That is the aforementioned Fi effect indeed, or in depth scrutiny of the human element. Essentially, what the two groups of authors had in common is in depth scrutiny of Feeling. This needs not be attributed strictly to Fi, but to the interplay of Feeling and Intuition. Introversion does help, but it is not a necessary factor. For this reason, many ENFJs, like Ivan Turgenev for example, have also mastered the enterprise of scrutiny of Feeling, as well as ENFPs,(Leo Tolstoy). However, Introversion did prove to be a slight advantage as the INFs managed to probe deeper. As we clearly see that Virgil(INFP) and Goethe(INFJ) had powerful insights into human nature, as well as profound and careful scrutinty of the phenomena they set sight on. Now, their Extroverted counterparts--Tolstoy(ENFP) and Turgenev, seemed to lack the profundity and cautiousness of thought that the previous two had.
Thus, the Fi effect that I see in the INFJs is the ability to probe deeply and scrutinize carefully. This should not be attributed strictly to Fi, but to the factor of Introversion. (Technically the ENFs with a well developed secondary function could also learn to do this, though it comes the easiest to the most Introverted of Idealists. Hence, the easieast to the INFP and second easiest to the INFJ.)
So, you'd be happy to replace the Fi effect with the Introversion factor in addition to the interfuse of Intuition and Feeling.
*P.S
Next time you come here make sure you leave your value judgments and baseless intuitions at the door because I just cant be made to suffer fools.
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Not only is fe better then fi (emo) but thier 3rd function is Ti (the best function XD).]
You're using the word smart in a fashion radically biased towards the NT temperament. Being smart in the way Virgil and Shakespeare were has little to do with Thinking. This is the respect that the INFJs are 'smartest' in. Indeed smarter than other NF types in the 'NT way' because of their Thinking faculty.
Brilliant revolutionists and people were infjs such as Martin Luther ).]
INFJs can become quite the powerful political force because of their commitment to their vision (Ni) and drive to transduce it to external world phenomena.
and the J doesn't make them closed-minded at all, like alot of the other j's I met... and in fact, the INFJ combination of traits is one of the best combinations i've seen. INFJs are brilliant but kind and revolutionary!).]
J has almost nothing to do with close-mindness. The code J translates as-Extroverted Judgment(applying judgment to the external world)--or Extroverted Thinking or Extroverted Feeling.
Close mindedness is associated with the lack of openness to ideas. That is property of Sensation, or lack of Intuition to perceive ideas with.
SJs, the least Intuitive of all are often reviled for being closed-minded. They are also known for having strong Judging tendencies. Yet, their closed-mindedness is about their Si (which eclipses Intuition) and not their Extroverted Judgment.
Now, if we take the same--keep the Extroverted Judgment and make them Intuitive--thus the INJs. We notice that the INTJ and the INFJ are most open to ideas, whilst the ISTJ and ISFJ the least.
The INFJ and the INTJ, because of their in depth scrutiny of Intuition (factor of Introversion), in this regard outdo (they are more open to ideas) their dominant Extroverted Counterparts (ENPs).
INFJs are brilliant but kind and revolutionary!).]
The dominant Introverted Intuition gives the INFJ the radically individualistic and perceptive mindset necessary to fit the above description.