Why Carl Jung Would Be Annoyed By Modern Myers-Briggs Content

If Carl Jung were alive today, he’d probably view the current Myers-Briggs landscape with a kind of split verdict. Part of him would be gratified to see his ideas so widely adopted, filtering out from academic psychology into personality blogs and quizzes across the internet. Another part would wince at how much of the original thinking got lost along the way.

The irony is that modern Myers-Briggs content owes its existence entirely to Jung. Katherine Briggs and Isabel Briggs Myers built their 16-type theory directly on his framework of psychological types, adapting his ideas into the personality assessment millions now take online. As Isabel Briggs Myers wrote in her 1980 book Gifts Differing, "The theory of type presented here is C. G. Jung's... The purpose of the indicator is to determine, by simple and accessible means, the basic preferences of people in regard to perception and judgment, so that the valuable effects of these preferences may be put to use."

So what exactly got lost in translation between Jung's original theory and the version we know today? As personality typing moved from academic texts into online spaces, much of the strange, difficult core of Jung's thinking fell away. It has left behind a cleaner, more marketable version of his ideas—but at what cost? 

No, Introverts Aren't Just Shy

The Myers-Briggs framework defines Extraversion and Introversion around where you focus your attention and energy. Extraverts focus outward on the world of people and things, whereas Introverts focus inward on the world of ideas. That’s actually pretty close to Jung’s analysis. In his foundational text Psychological Types, Jung explained that Extravert's attitude is characterized by an outward flow of “libido” or psychic energy, whereas the Introvert's attitude is characterised by an inward flow of libido.

Unfortunately, much pop psychology content flattens E vs I into how socially confident someone is, an interpretation Jung never intended. Personality quizzes often frame the distinction around questions like “Do you initiate social interactions?” or “Do you feel comfortable at parties?” These are valid questions for measuring trait Extraversion, but the conclusions drawn from them are often wrong. The answers get read as evidence of social confidence, rather than where someone's energy naturally flows, and that's how the misconception that Introverts are just shy or have social anxiety comes from, as if the only reason someone might prefer less social interaction is because they struggle with it. 

Another issue is that Extraversion and Introversion are presented as either/or boxes. Every 16-type test assigns you a four-letter type like INTJ or ESFP because that’s how Myers and Briggs built the system, with each letter a useful shorthand for describing preference. The trouble comes when the letter gets treated as an absolute, as if scoring E means someone has no access to Introversion at all. Jung would have pushed back hard on that. He explicitly warned against treating E and I as binary, absolute categories: "There is no such thing as a pure extravert or a pure introvert. Such a man would be in the lunatic asylum." 

Classification vs. Transformation

Perhaps the biggest difference between Jung and modern personality content isn't that they define types differently. It's that they have a different focus.

For much of the internet, personality content focuses on helping you discover your type through quizzes and assessments and then uses that label to recommend careers, predict relationship compatibility, navigate couple arguments, or even guide hiring decisions (something Truity does not recommend). 

This practical bent isn't an accident of the internet age. Myers designed her indicator during the Second World War specifically to help place women entering the workforce into suitable jobs, so the tool was built from the outset to sort people into categories and act on the result. The internet simply scaled up what the assessment was already built to do. Even content that appears to focus on personal development, such as becoming a “healthy” version of your type, still begins with the assumption that your main task is to better understand and optimize your category. 

But Jung wasn't interested in helping people become better ENFPs or healthier ISTJs by weeding out self-sabotaging tendencies that prevented them from getting there. His focus was on helping them to become less one-sided by learning to engage with the parts of themselves that don't come naturally, rather than over-identifying with the ones that do. As he wrote in Modern Man in Search of a Soul, “Wholeness is not achieved by cutting off a portion of one's being, but by integration of the contraries.”

Classification itself, in Jung's view, was never the point. He maintained that typology existed only to explain why people perceive and approach the world differently, not to sort them into fixed boxes. “The classification of individuals means nothing, nothing at all. It is only the instrumentarium for the practical psychologist to explain, for instance, the husband to a wife or vice versa.”

Ignoring the Irrational

Psychological types were only a small piece of Jung's work. The bulk of his career was devoted to understanding the collective unconscious, a shared psychological layer populated by universal symbols and patterns inherited across humanity. In other words, Jung believed the mind was far stranger and far more mysterious than any typology system could capture, because every mind contains deep mental archetypes, such as the Hero, the Mother or the Trickster, which shape how we react to the world. 

In modern personality content, the symbolic world of the unconscious that fascinated Jung is largely absent, and the focus falls almost entirely on the conscious personality. Jung would probably have considered that only a starting point of the much bigger psychological journey toward becoming less one-sided and more whole.

For Jung, the real work wasn't understanding your conscious personality, but integrating the parts of yourself it leaves behind. These, he believed, surface in the unconscious to balance out your one-sidedness. "The activity of the unconscious is compensatory to the one-sidedness of the conscious attitude."

For example, someone who consciously identifies strongly with rational Thinking may neglect the Feeling side of their personality. This does not mean they place less value on people or relationships in the abstract. It means their capacity to weigh decisions through that lens stays less conscious, and it may emerge in unexpected ways, through fantasies, dreams, intrusive thoughts or seemingly irrational reactions. 

Jung would likely consider leaving such expressions of the unconscious out a major limitation, since understanding what they reveal about ourselves is the key to taking greater control of our lives. As he famously stated, “Until you make the unconscious conscious, it will direct your life and you will call it fate.”

The Jungian Shadow

Most people who take a Myers-Briggs assessment know their four-letter type and nothing more. But underneath that four-letter type sits something Myers and Briggs borrowed directly from Jung, four mental tools Jung called functions (or cognitive functions).

Everyone processes the world using these four tools. Two are about taking in information and two are about making decisions. Everybody uses all four to some degree, but each of us leans on one far more than the others, and that becomes our natural go-to. A second tool backs it up. A third gets used less often and less confidently, and a fourth barely gets used at all, and tends to feel awkward or effortful whenever it does. Myers and Briggs called this ordering a person's dominant, auxiliary, tertiary and inferior function, simply the sequence in which Jung's four functions come naturally to a person. An INFJ, for example, relies on Introverted Intuition as their dominant function, with Extraverted Feeling, Introverted Thinking and Extraverted Sensing appearing, in that order, down the stack. 

Some corners of online typology go further still. Decades after Myers and Briggs, Jungian analyst John Beebe developed the function model further and proposed that, behind those four functions sit four more, the same four again but working in reverse. These are dubbed "shadow functions" and they're mostly unconscious. They serve as sources of stress reactions and defensive behavior, the parts of you that surface when you're worn down or cornered.

Beebe’s model proposes a fixed stack of eight functions—the first four forming the conscious ego, while the lower four explicitly constituting the structured shadow stack. His work is based on Jung, yet Jung's own idea of the shadow was something else entirely, and it predates all of this.

For Jung, the shadow wasn't a set of cognitive functions at all. It was the entire part of yourself you refuse to look at, the traits, urges and impulses you've pushed out of your self-image because they don't fit who you believe yourself to be. For example, someone who sees themselves as patient and selfless may consciously disidentify with their own anger and desire for recognition. That's their shadow. Someone who sees themselves as modest and unambitious may suppress their confidence and aspirations, even though these are highly positive traits, since that doesn't fit their self-image either. As Jung defined it, “The shadow personifies everything that the subject refuses to acknowledge about himself.” 

Jung's shadow is far broader and more fluid than Beebe's shadow functions, and it asks a deeply uncomfortable question, what parts of myself am I refusing to see? Modern personality content doesn't really encourage us to examine these disowned parts of ourselves. The focus stays on the parts we already identify with.

This is where Jung would likely have felt the whole modern project missed the point. He saw the shadow as one of the first and most important stops on the road to individuation, his term for the lifelong work of becoming a fully integrated person rather than a collection of traits. Skipping that step doesn't just leave a theory incomplete—it leaves the person incomplete, since the qualities we refuse to face don't disappear, they simply act on us from the dark. 

As Jung said, "The encounter with oneself is, at first, the encounter with one's own shadow... This is the first test of courage on the inner way, a test sufficient to frighten off most people." Reducing Jung to a four-letter code was never going to capture that. Real self-knowledge, in his view, meant facing the parts of yourself you'd rather not.