Similarly, if your primary function is sensation, your auxiliary (secondary) functions are thinking and feeling, and your inferior function is intuition.
Same logic applies to personality attitudes — extroversion and introversion.
According to Jung’s view, it’s not possible to demonstrate extroversion or introversion in isolation.
To become obvious, it must be associated with one of the four functions — thinking, sensation, intuition, and feeling.
Jung saw both introversion and extroversion as attitudes.
Introversion, according to him, is one’s focus on inner world, while extroversion is one’s focus on the outside world.
The less preferred function — the fourth function — is used unconsciously; Jung called it “inferior function”.
Inferior function is always the opposite of your primary function.
If your primary mode is extroverted thinking, your less used and less conscious mode would be introverted feeling.
Generally, people find it hard to operate using their least preferred function, but this doesn’t mean, however, that you can’t develop your inferior function and raise it to a more conscious level.