I'll look up some links as well, but for some reason the distinction between these two is not entirely clear to me. Anyone have a good handle on it? Fi-Fe and Si-Se make sense, but the Ni-Ne and Ti-Te bit, not so much for some reason.
Ti--Looks at logical problems to solve in terms of how they relate to the self.
Te-Looks at the self in terms of how it relates to logical problems to solve.
A Ti will pick a system apart because he/she enjoys doing it--internally inspired. Ti also has a lot to do with setting up internally founded goals, for this reason Tis have an internal sense of purpose that Tes have a more difficult time acquiring.
A Te will give advice to everyone who asks and will enjoy giving advice even when its not desired. Likes to apply logic to the external world, hence they like to organize what is there.
Fi-Feelings relate to the self. Fi builds an internal sense of purpose, while Fe relies on the external.
Fe-Self relates to the feelings of others. This is why Fes enjoy giving emotional support like Fis enjoy giving advice.
Se/Ne-See the external world as a thing in itself, independent of how we perceive it. They tend to think of ideas as something to be shared, not something utilized for our own use. This is why ENPs often have the best presentation/communication skills, and ESPs make the best salesmen because they are attuned with the concrete world and can present it objectively to others. This is also why NPs enjoy sharing knowledge even when they arent sure how reliable it is, while NJs tend not to unless they are certain that it is reliable. Ni scans knowledge it receives in accordance to the way it relates to the self, Ne does not, Ne does not think of knowledge in terms of how it relates to the self, it only thinks of how the self relates to knowledge.
Si/Ni-Can always be counted on to show us what knowledge we need and under what circumstances. Ni/Si are past-oriented,unlike the Ne/Se, this is why INJs can often remember abstractions that fascinated them long ago despite not having solid memories that ISJs do. Ni in itself is not future oriented, it is only attracted to the future because of its abstract nature which allows for it to link cause and effect and foresee what may happen in the future. Ni/Si are also attracted to certainty more because they think of knowledge in terms of how it relates to the self, so the question they ask is--what do I know, yet Se/Ne asks--what knowledge can I share with others. Or --this sounds interesting, I wonder what I can comment on this..(thinking of how the self relates to what is there to discover)..This is why Se/Ne are natural discoverers and are attracted to novelty and new experiences, because they think of knowledge/concrete world in accordance to how they can impact it..not in terms of how knowledge/concrete world can impact them (Ni/Si) Moreover, Ni will make a vision of how I (self) should live my life, how I could utilize all of these ideas I learn abot to my own advantage (Like Ayn Rand for instance, Or Nietzsche's Zarathustra, most of the existentialist writers were Ni dominant..) and Ne will seperate the object from the subject in its vision, and imagine the world as being an object independent of the subject--the subject relates to the object--not the other way around. Hence, an Ne visionary will envision the big picture and try to come up with a way to change the world--to impact it--Bertrand Russell,Voltaire, Machiavelli are the case in point. (Again, an allusion to how an Ni thinkers will perceive knowledge in terms of how it will change him, and an Ne thinker will perceive it in terms of how he can change what has already been discovered.) This also may explain why ISJs may be afraid of new ideas because they think that ideas by definition are likely to change them and they are afraid of that. Moreover, in philosophy Ni thinkers had a solid foundation for all of their ideas that they never wanted to change and could be hostile to radically different views because they can errode the foundation that they all stand on, whilst the Ne would not have to worry about that because they do not think of knowledge as essential to their being.
Keep in mind for this Jung's distinction between Introversion and Extroversion.
Introverts think of the world in terms of how it relates to the self and Extroverts in terms of how the self relates to the world.
So, to recapitulate. Tes tend to think of logic in terms of how they can relate to it. So they apply themselves to the impersonal standard that has been established by others. Yet Tis question those standards as they think of all problems in terms of how they relate to them. There is nothing fundamental to their thinking in the external world, it is the internal that is truly essential.
Same with Fe/Fi. Fe applies self to the external values of the community and Fi questions those values and thinks that the true standard comes only from the inside. So they synthesize all that is there in the external world and forge a standard of their own. From this one could adduce that Fes tend to want for their relationships to be fixed and settled while Fis like to toy around with them in order to find the best that there are. Same as Tis like to toy around with problems to solve to find the best solutions while Tes want to find the most practical solutions and be settled there. NTPs are more likely to enjoy arguing as a sport, and NFPs more likely to be adventurous with their relationships --enjoy moving on from one to another. Fe/Te lean towards a Conservative way of thinking (status quo) and Ti/Fi towards liberal.
Ne/Se think of ideas and the world to perceive in terms of how they can influence it, whilst Ni/Si think of ideas in terms of how they relate to them, how the world--knowledge can change them and not vice versa.
Hope this helped sort out whatever confusions that be..
