In ‘Psychologische Typen’ C.G.Jung explains his opinions on introversion in more than 400 pages. When we use the label ‘introvert’ we should think of this ideas of Jung. The label is shorthand for a very complicated story about people and their behavior. Jung does ask his readers to be very careful with the types, because it is a complicated matter.
In the blogpost on introversion an image of a Tarot card “the hermit” was added.
Jung did write the book on ‘Psychologische Typen’ as a psychiatrist, he needed background to his thoughts on therapy. Jung did philosophical, not psychological research, the book is full of literature and poetry. Jung did no empirical studies, he used his experience as a psychiatrist. The opinions of Jung as a psychiatrist and Tarot both are not modern science. Maybe the difference is psychiatrics (in the way of Jung) is a narrative discipline and Tarot is a narrative.
Labels like introvert or ADHD, or smart are very dangerous, because they are shorthand words. Most labels are shorthand for a load of books and discussions on a subject.
Jung does name different introvert types which are very different from each other. Just looking a little bit closer at Jung his thoughts on introversion will show this.
Jung saw 4 types of introversion (see diagram), and he stresses that these types never occur in a clear and ideal way. Jung explains these 4 types always exist in pairs or combinations (page 336). He mentions the combination of the thinking introvert with the intuitive traits. These combinations always cause struggle and change in the mind. Keep in mind Jung had a very complicated (complex?) view on human psychology and these types are only a small part of it.
The Tarot card of the Hermit is also a shorthand of a lot of stories on human life and types. And like different psychiatrists have different opinions on the human psychology (Freud, Jung, and others) books on Tarot do tell different stories on each card.
By the way: Jung used a kind of ‘rhizomatic’ analogy in his description of consciousness. Jung uses an image of a sea of the unconsciousness with islands of consciousness. These islands do appear on the surface and disappear below the surface in a kind of dancing. Like shoots of a rhizome do grow and appear above ground, and die and disappear.