Fight Club’s accomplishment is to elicit in us the instinctive fear, resistance, and embarrassment we all experience around the domain of our inferior function, whichever function that may be for us. The reward for sticking with the movie until the end is a catharsis that feels as if we have integrated our own inferior function.
4 - Anima/Animus
I think many of us would be quick to put our inferior and embarrassing Anima on the pyre, and happily satiate our Heroes. But the Hero needs to sacrifice its preeminence and allow the Anima to experiment and thrive if we are to find ourselves truly committed to what we do, not to mention fulfilled by it.