From Wikipedia, the free encyclopedia - View original article
INFJ (introversion, intuition, feeling, judging) is an abbreviation used in the publications of the Myers-Briggs Type Indicator (MBTI) to refer to one of the sixteen personality types. The MBTI assessment was developed from the work of prominent psychiatrist Carl Jung in his book Psychological Types. Jung proposed a psychological typology based on the theories of cognitive functions that he developed through his clinical observations.
From Jung's work, others developed psychological typologies. Jungian personality assessments include the MBTI instrument, developed by Isabel Briggs Myers and Katharine Cook Briggs, and the Keirsey Temperament Sorter, developed by David Keirsey. Keirsey referred to the INFJs as Counselors, one of the four types belonging to the temperament he called the Idealists. INFJs are among the rarest of types, usually accounted as being between 1–2% of the population.
By using their preference in each of these areas, people develop what Jung and Myers called psychological type. This underlying personality pattern results from the dynamic interaction of their four preferences, in conjunction with environmental influences and their own individual tendencies. People are likely to develop behaviors, skills, and attitudes based on their particular type. Each personality type has its own potential strengths as well as areas that offer opportunities for growth.
The MBTI tool consists of multiple choice questions that sort respondents on the basis of the four "dichotomies" (pairs of psychological opposites). Sixteen different outcomes are possible, each identified by its own four-letter code, referred to by initial letters. (N is used for iNtuition, since I is used for Introversion). The MBTI is approximately 75% accurate according to its own manual.
INFJs are conscientious and value-driven. They seek meaning in relationships, ideas, and events, with an eye toward better understanding of themselves and others. Using their intuitive skills, they develop a clear and confident vision, which they then set out to execute, aiming to better the lives of others. Like their INTJ counterparts, INFJs regard problems as opportunities to design and implement creative solutions.
INFJs can adapt easily in social situations due to their complex understanding of an individual's motivations; however, they are true introverts. INFJs are private individuals who prefer to exercise their influence behind the scenes. Though they are very independent, INFJs are intensely interested in the well-being of others. INFJs prefer one-on-one relationships to large groups. Sensitive and complex, they are adept at understanding complicated issues and driven to resolve differences in a cooperative and creative manner.
INFJs have a rich, vivid inner life that they may be reluctant to share with those around them. Nevertheless, they are congenial in their interactions and perceptive of the emotions of others. Generally well liked by their peers, they may often be considered close friends and confidants by most other types; however, they are guarded in expressing their own feelings, especially to new people, and tend to establish close relationships slowly. INFJs tend to be easily hurt, though they may not reveal it (except to their closest companions). INFJs may "silently withdraw as a way of setting limits" rather than expressing their wounded feelings—a behavior that may leave others confused and upset.
INFJs tend to be sensitive, quiet leaders with a great depth of personality. They are intricately, deeply woven, mysterious, highly complex, and often puzzling, even to themselves. They have an orderly view toward the world but are internally arranged in a complex way that only they can understand. Abstract in communicating, they live in a world of hidden meanings and possibilities. With a natural affinity for art, INFJs tend to be creative and easily inspired, yet they may also do well in the sciences, aided by their intuition.
Drawing upon Jungian theory, Isabel Myers proposed that for each personality type, the cognitive functions (sensing, intuition, thinking, and feeling) form a hierarchy. This hierarchy represents the person's default pattern of behavior.
The Dominant function is the personality type's preferred role, the one they feel most comfortable with. The secondary Auxiliary function serves to support and expand on the Dominant function. If the Dominant is an information gathering function (sensing or intuition), the Auxiliary is a decision making function (thinking or feeling), and vice versa. The Tertiary function is less developed than the Dominant and Auxiliary, but it matures over time, rounding out the person's abilities. The Inferior function is the personality type's Achilles's heel. This is the function they are least comfortable with. Like the Tertiary, the Inferior function strengthens with maturity.
Jung and Myers considered the attitude of the Auxiliary, Tertiary, and Inferior functions to be the opposite of the Dominant. In this interpretation, if the Dominant function is extraverted, then the other three are introverted, and vice versa. However, many modern practitioners hold that the attitude of the Tertiary function is the same as the Dominant. Using the more modern interpretation, the cognitive functions of the INFJ are as follows:
Ni synthesizes seeming paradoxes to create the previously unimagined. These realizations come with a certainty that demands action to fulfill a new vision of the future, solutions that may include complex systems or universal truths.
Fe seeks social connections and creates harmonious interactions through polite, considerate, and appropriate behavior. Fe responds to the explicit (and implicit) wants of others, and may even create an internal conflict between the subject’s own needs and the desire to meet the needs of others. 
Ti seeks precision, such as the exact word to express an idea. Ti notices the minute distinctions that define the essence of things, then analyzes and classifies them. Ti examines all sides of an issue, looking to solve problems while minimizing effort and risk. Ti uses models to root out logical inconsistency.
Se focuses on the experiences and sensations of the immediate, physical world. With an acute awareness of the present surroundings, it brings relevant facts and details to the forefront and may lead to spontaneous action. Weak Se in the INFJ may result in a detachment from the sensory reality, but when the function is in use it adds a playful counter to the serious nature of Ni. 
Later personality researchers (notably Linda V. Berens) added four additional functions to the descending hierarchy, the "shadow" functions to which the individual is not naturally inclined but which can emerge when the person is under stress. For INFJ these shadow functions are (in order):