Also, introversion and extraversion are merely categories, not destiny, and any given individual can develop opposite traits, and ideally will do so. While Freud believed in the personal unconscious , Jung, once an associate of Freud, accepted the concept of the personal unconscious but also postulated the concept of the collective unconscious . Probably the central therapeutic concept of Jung's analytical psychology is the concept of the need for balance to gain psychic health . This is the concept of compensation . Just as dreams can be personal or archetypal, so can literature.
Visionary literature compensates for collective psychic imbalance.
The collective unconscious is common to the human race the world over. To achieve psychic health, or wholeness, the aim is individuation , becoming a whole, individual person. Archetypes come from the collective unconscious and by definition can be positive and negative. In theory their numbers are limitless. For more on using Jung to analyze literature, see my book and the links below.