Jung sees the introvert as less sociable, more withdrawn, and absorbed in his own inner life. Extroverts and introverts can also be divided into subtypes according to which function predominates in their approach to the universe. Extroverts can be divided into the four subtypes, and introverts can be divided into these four subtypes as well. Thinking is the function whereby the individual attempts to apply reasoning to his environment. He thinks in terms of logic and facts.
Feeling is the function associated with experiencing pleasure or unpleasantness.
This individual subjectively applies personal values to his experiences. Sensation is the function connected to perceptions themselves. This individual relies on aesthetic appreciation to relate to the world. Intuition is the function seen as pertaining to psychic, mystic, or unconscious inner perception.