Carl Jung was born in 1875 in Switzerland. He became the world-renowned founder of analytical psychology that focuses on a person's inner life to help understand how they think.

Carl Jung: the founder of analytical psychology

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Jung published a book in 1921 where he coined and discussed the two terms.
He wrote that introverts gained their energy from self-dialogue and protect themselves against external claims on their energy with shyness or other means. Extroverts look outward for their energy. But Jung didn't think there was such a thing as a pure introvert or extrovert.

Carl Jung coined “introvert” and “extrovert”

The book, published in 1959, showed that Jung was more interested in what rumors about UFOs said about the human mind than whether aliens really existed.

Carl Jung wrote a book on flying saucers

Jung and the theoretical physicist Wolfgang Pauli, known for proposing the neutrino, were interested in dream analysis.
Their conversations went on to explore fundamental questions regarding the nature of reality through the lens of physics and psychology. This discussion led Jung to discover synchronicity, or meaningful coincidences.

Carl Jung collaborated with a Nobel-winning physicist

Jung and physicist Wolfgang Pauli discussed the world of the occult.
They discussed topics from physics to psychology, extrasensory perception (ESP), UFOs, Armageddon, Jesus, Yahweh, and dreams.

Carl Jung speculated on the occult

He identified two people within himself, calling them No. 1 and No. 2.
No. 1 was the child of his parents and times. No. 2 was a timeless individual with no definable character. Later, his thoughts on No. 1 and No. 2 provided the basis for his ideas on ego and self.

Carl Jung thought he was two people

<figure><img alt="Jung_1910-rotated.jpg" src="https://thumbs-prod.si-cdn.com/3kl1cM0L_zsnNQjglW1eykoa_is=/800x600/filters:no_upscale()/https://public-media.si-cdn.com/filer/b0/f4/b0f41a9a-41da-4074-8ca0-3b565717bf20/jung_1910-rotated.jpg" width="753" height="565"><figcaption dir="auto">Jung's interest in the subconscious was a driving force in his work. (Wikimedia Commons)</figcaption></figure><div><a role="button" tabindex="0">Share to Facebook</a></div><div><a role="button" tabindex="0">Share to Twitter</a></div><div><a role="button" tabindex="0">Share to Reddit</a></div><div><a role="button" tabindex="0">Share to Pinterest</a></div><div><a role="button" tabindex="0">Share to LinkedIn</a></div><div><a role="button" tabindex="0">Share to Flipboard</a></div><div><a role="button" tabindex="0">Share to Email</a></div><div><a role="button" tabindex="0">Share to Print</a></div><div><a role="button" tabindex="0">Share to More</a></div>Carl Jung was born on this day in 1875 in Thurgau, Switzerland. Some years later, he became the world-renowned founder of analytical psychology, a branch of the discipline that focuses on a person’s inner life to help understand how they think and any problems they may be facing. It should come as no surprise, then, that Jung himself was quite a complicated&nbsp;person. Learn more about his quests for knowledge and self with these five lesser-known facts: Jung coined “introvert” and “extrovert” The terms “introverted” and “extraverted” (Jung spelled the latter with an a, though the dominant spelling in the U.S. now uses an o)&nbsp;first <a href="http://psychclassics.yorku.ca/Jung/types.htm" dir="ltr">appear</a> in Psychological Types, a book which Jung published in German in 1921. “In his model, differences between the personalities basically boil down to energy,” <a href="http://io9.gizmodo.com/the-science-behind-extroversion-and-introversion-1282059791" dir="ltr">writes</a> Joseph Bennington-Castro for io9.Introverts, as Jung wrote, get their energy from their own self-dialogue and defend themselves “against external claims” on their energy with shyness or other means. Extroverts, on the other hand, are “friendly and accessible characters” who are constantly looking outward for their energy. This theory has been a basis for everything from the Myers-Briggs Type Indicator to <a href="https://www.buzzfeed.com/erinlarosa/31-unmistakable-signs-that-youre-an-introvert?utm_term=.fsjmla72l#.do2B9xwY9" dir="ltr">memes</a> about canceling plans or hiding in the bathroom at parties. But Jung didn’t think anyone could be all introvert or all extrovert, Bennington-Castro writes: “‘There is no such thing as a pure introvert or extrovert,’” he reportedly said. ‘Such a person would be in the lunatic asylum.’”Jung wrote a book on UFOsThe book's text, however, proved that Jung was far more interested in what rumors about aliens said about the human mind than whether the aliens themselves actually existed.He collaborated with a Nobel-winning physicist Jung had an “unlikely friendship” with theoretical physicist Wolfgang Pauli, <a href="https://www.brainpickings.org/2017/03/09/atom-and-archetype-pauli-jung/" dir="ltr">writes</a> Maria Popova for Brain Pickings. Pauli, who is known for first proposing&nbsp;the neutrino, was interested in dream analysis, but his friendship with Jung went beyond that. “Their conversations and correspondence went on to explore fundamental questions regarding the nature of reality through the dual lens of physics and psychology,” writes Popova. &nbsp;Their years-long <a href="http://amzn.to/2ubjEzn" dir="ltr">correspondence</a> led Jung to come up with the idea of <a href="https://en.wikipedia.org/wiki/Synchronicity" dir="ltr">synchronicity</a> or “meaningful coincidences.”He speculated on the occultJung’s relationship with Pauli also led the pair to dive into the world of the occult. Amanda Gefter <a href="https://www.newscientist.com/article/dn17023-why-two-geniuses-delved-into-the-occult/" dir="ltr">writes</a> for New Scientist: &nbsp;<BLOCKQUOTE>The two sat for hours on end in Jung’s gothic-like mansion on the shores of Lake Zurich, dining on fine foods, drinking vintage wine and smoking the finest cigars while discussing topics from physics and whether there is a cosmic number at the root of the universe to psychology, ESP, UFOs, Armageddon, Jesus, Yahweh and Pauli’s dreams.</BLOCKQUOTE>He thought he was two people (sort of)Jung’s great innovation was taking his inner life seriously. This led him down some interesting pathes, <a href="https://www.theguardian.com/commentisfree/belief/2011/may/30/carl-jung-ego-self" dir="ltr">writes</a> Mark Vernon for The Guardian–like identifying two people within himself. He called them No. 1 and No. 2.“No 1 was the child of his parents and times,” Vernon writes. “No 2, though, was a timeless individual, ‘having no definable character at all–born, living, dead, everything in one, a total vision of life.’”Later in his career, No. 1 and No. 2 provided the basis of his ideas of <a href="https://www.thesap.org.uk/resources/articles-on-jungian-psychology-2/about-analysis-and-therapy/individuation/" dir="ltr">ego and self</a>.<div dir="ltr">Like this article? SIGN UP for our newsletter</div>

He thought he was two people (sort of) and more things you didn't know about the pioneering psychologist

Carl Jung was born on this day in 1875 in Thurgau, Switzerland. Some years later, he became the world-renowned founder of analytical psychology, a branch of the discipline that focuses on a person’s inner life to help understand how they think and any problems they may be facing.

It should come as no surprise, then, that Jung himself was quite a complicated person. Learn more about his quests for knowledge and self with these five lesser-known facts:

Jung coined “introvert” and “extrovert”

The terms “introverted” and “extraverted” (Jung spelled the latter with an a , though the dominant spelling in the U.S. now uses an o ) first <a dir="ltr" href="http://psychclassics.yorku.ca/Jung/types.htm">appear </a>in Psychological Types , a book which Jung published in German in 1921. “In his model, differences between the personalities basically boil down to energy,” <a dir="ltr" href="http://io9.gizmodo.com/the-science-behind-extroversion-and-introversion-1282059791">writes </a>Joseph Bennington-Castro forio9 .

Introverts, as Jung wrote, get their energy from their own self-dialogue and defend themselves “against external claims” on their energy with shyness or other means. Extroverts, on the other hand, are “friendly and accessible characters” who are constantly looking outward for their energy.

This theory has been a basis for everything from the Myers-Briggs Type Indicator to <a dir="ltr" href="https://www.buzzfeed.com/erinlarosa/31-unmistakable-signs-that-youre-an-introvert?utm_term=.fsjmla72l#.do2B9xwY9">memes </a>about canceling plans or hiding in the bathroom at parties. But Jung didn’t think anyone could be all introvert or all extrovert, Bennington-Castro writes: “‘There is no such thing as a pure introvert or extrovert,’” he reportedly said. ‘Such a person would be in the lunatic asylum.’”

Jung wrote a book on UFOs

The book's text, however, proved that Jung was far more interested in what rumors about aliens said about the human mind than whether the aliens themselves actually existed.

He collaborated with a Nobel-winning physicist

Jung had an “unlikely friendship” with theoretical physicist Wolfgang Pauli, <a dir="ltr" href="https://www.brainpickings.org/2017/03/09/atom-and-archetype-pauli-jung/">writes </a>Maria Popova for Brain Pickings . Pauli, who is known for first proposing the neutrino, was interested in dream analysis, but his friendship with Jung went beyond that. “Their conversations and correspondence went on to explore fundamental questions regarding the nature of reality through the dual lens of physics and psychology,” writes Popova.  Their years-long <a dir="ltr" href="http://amzn.to/2ubjEzn">correspondence </a>led Jung to come up with the idea of <a dir="ltr" href="https://en.wikipedia.org/wiki/Synchronicity">synchronicity </a>or “meaningful coincidences.”

He speculated on the occult

Jung’s relationship with Pauli also led the pair to dive into the world of the occult. Amanda Gefter <a dir="ltr" href="https://www.newscientist.com/article/dn17023-why-two-geniuses-delved-into-the-occult/">writes </a>for New Scientist :

The two sat for hours on end in Jung’s gothic-like mansion on the shores of Lake Zurich, dining on fine foods, drinking vintage wine and smoking the finest cigars while discussing topics from physics and whether there is a cosmic number at the root of the universe to psychology, ESP, UFOs, Armageddon, Jesus, Yahweh and Pauli’s dreams.

He thought he was two people (sort of)

Jung’s great innovation was taking his inner life seriously. This led him down some interesting pathes, <a dir="ltr" href="https://www.theguardian.com/commentisfree/belief/2011/may/30/carl-jung-ego-self">writes </a>Mark Vernon for The Guardian –like identifying two people within himself. He called them No. 1 and No. 2.

“No 1 was the child of his parents and times,” Vernon writes. “No 2, though, was a timeless individual, ‘having no definable character at all–born, living, dead, everything in one, a total vision of life.’”

Later in his career, No. 1 and No. 2 provided the basis of his ideas of <a dir="ltr" href="https://www.thesap.org.uk/resources/articles-on-jungian-psychology-2/about-analysis-and-therapy/individuation/">ego and self </a>.

Bite‑sized knowledge
to upgrade
your career

Five Fascinating Facts About Carl Jung

Carl Jung: the founder of analytical psychology

Carl Jung coined “introvert” and “extrovert”

Carl Jung wrote a book on flying saucers

Carl Jung collaborated with a Nobel-winning physicist

Carl Jung speculated on the occult

Carl Jung thought he was two people

Carl Jung: Taking inner life seriously | Mark Vernon

An Introvert Hangover Is a Real Thing—This Can Help | Well+Good

Five myths about genius

Bite‑sized knowledgeto upgradeyour career

Five Fascinating Facts About Carl Jung

Carl Jung: the founder of analytical psychology

Carl Jung coined “introvert” and “extrovert”

Carl Jung wrote a book on flying saucers

Carl Jung collaborated with a Nobel-winning physicist

Carl Jung speculated on the occult

Carl Jung thought he was two people

Carl Jung: Taking inner life seriously | Mark Vernon

An Introvert Hangover Is a Real Thing—This Can Help | Well+Good

Five myths about genius

Bite‑sized knowledge
to upgrade
your career