functions

	When, Where, What, How	Why
ESTJ	Exports world thought parts	Good
ISTJ	Exports self thought parts	Good
ESFJ	Exports world feeling parts	Good
ISFJ	Exports self feeling parts	Good
ENTJ	Exports world thoughts whole	Truth
INTJ	Exports self thoughts whole	Truth
ENTP	Imports world thoughts whole	Truth
INTP	Imports self thoughts whole	Truth
ESTP	Imports world thought parts	Beauty
ISTP	Imports self thought parts	Beauty
ESFP	Imports world feeling parts	Beauty
ISFP	Imports self feeling parts	Beauty
ENFJ	Exports world feelings whole	Harmony
INFJ	Exports self feelings whole	Harmony
ENFP	Imports world feelings whole	Harmony
INFP	Imports self feelings whole	Harmony

Function Order

Psychologist Carl Jung discovered the "What" and "How" could be functionally paired with the Where. This gives the function preferences below, with column being the most natural, and column four being the least natural.

	1	2	3	4
ESTJ	Te	Si	Ne	Fi
ISTJ	Si	Te	Fi	Ne
ESFJ	Fe	Si	Ne	Ti
ISFJ	Si	Fe	Ti	Ne
ENTJ	Te	Ni	Se	Fi
INTJ	Ni	Te	Fi	Se
ENTP	Ne	Ti	Fe	Si
INTP	Ti	Ne	Si	Fe
ESTP	Se	Ti	Fe	Ni
ISTP	Ti	Se	Ni	Fe
ESFP	Se	Fi	Te	Ni
ISFP	Fi	Se	Ni	Te
ENFJ	Fe	Ni	Se	Ti
INFJ	Ni	Fe	Ti	Se
ENFP	Ne	Fi	Te	Si
INFP	Fi	Ne	Si	Te

So we can see that as a person grows from 1 and 2, to fill out into 3 and 4, they become more like another temperament (represented by the color).

8 Functions

Te	Thoughts of world	plan implementation
Ti	Thoughts of self	plan design
Fe	Feelings of world	harmony socially
Fi	Feelings of self	harmony identity
Se	Parts of world	specific tactile
Si	Parts of self	specific analytical
Ne	Wholeness of world	exploration outside
Ni	Wholeness of self	exploration inside