5 Brilliant ISTJ Secrets (A Definitive Guide)

In this brief guide, we will look at 5 ISTJ secrets that will help you know an ISTJ better, and we will also look at some other things like ISTJ famous people and celebrities, and ISTJ weaknesses.

ISTJ Secrets 

There are some things about ISTJ that are not secrets, ISTJs are quite famous, or sometimes even infamous, for being extremely detail-oriented and logical, and true to their introverted nature, they are more often than not rather reserved. 

The big ISTJ secret is that even though they seem almost callous and detached from everything, the reason for this detachment is not supposed to be to ensure frigidity, but rather they secretly do this as an act of consideration and responsibility. 

This may not make sense to many people, but the way the ISTJ cares and shows concern and dedication to those around them is in the way they outline plans for them and try to solve all their problems, which may make the ISTJ care a secret, as it just seems overbearing on the surface.

This is why it is a secret to the ISTJ why people just don’t seem to let them dominate them and walk all over them; they are trying to help, and why people don’t seem to want someone telling them exactly what to do all the time is beyond them, because secretly that is what they would want. 

The ISTJ secret to success is their tendency to lay down plans that work and structuring ideas in a format that works to make everyone around them also extremely effective. 

The ISTJ genuinely cares, and they want people to reach their goals and avoid obstacles, and instead of helping people out the approach they take is more, tell them exactly what to do, and be disappointed when they don’t want to do it exactly in that manner.

The ISTJ is a typical introvert, which does not mean that they are not inclined to being with people, it means that their understanding of people is extremely limited, and they think that everyone will function the way they do and that facts, figures, and details work for everyone, not just them.

The ISTJ secretly also thinks that unless they keep their emotions out of the picture their ability to solve a problem or be responsible for their tasks won’t work as well.

The ISTJ may also believe that if they are emotional or if they pay more attention to their feelings, they won’t be able to notice when something isn’t working right, and they care so much about taking things apart and solving problems for people, that they just push all their emotions to a secret corner of their mind.

The ISTJ is a master of secret compartmentalization and objective analysis, which means that their logic and thinking based part is always miles away from their emotion.

Often the emotions of the ISTJ are so secret though that people mistake their reservedness and logical nature for an uncaring or unfeeling attitude, when in fact the ISTJ is secretly capable of feeling so much more.

ISTJ Secrets 1: They are Value Driven

The ISTJ secret to their rigid moral code and why they fit in so well into organizations is that they are very value-driven and their belief system drives their identity tremendously.

The ISTJ has an introverted feeling function which means that for one thing, their emotions will likely always be their most guarded secret, and secondly, they place a lot of importance in having and holding on to one’s beliefs, and they can go to war for theirs.

The ISTJ beliefs are the most sacred and precious things to them, and they will never stand for a confrontation on these, and they are also likely to try and enforce them on others because they honestly believe that that is the way to go for everyone around them.

ISTJ Secrets 2: They want to Help

The ISTJ’s secret behind being so overbearing and trying to get others to follow their plans is simply that they find it to be the best kind of help they can give.

They basically dominate and interfere because they care, and this is why it hurts them so deeply when people rebel against their plans or rules because it is their version of feeding you chicken su\oup when you have the flu, they do it as a means of affection, care, and help.

The ISTJ emotions are complex and secret, and they may feel a great deal but they may have difficulty expressing it, so they use the next best thing, which is their logic and analytical abilities, but most people may take years to understand this, and cause them a lot of frustration in the process.

ISTJ Secrets 3: They Notice things

The ISTJ has a keen sense of their environment, which they usually use to make and execute plans, but they may also use it to figure out what is new or different about the environment, which they may not care for either given that they like things to stay the same.

The typical ISTJ is not someone one can keep a secret, they notice little things; like a rug that has been moved or a lamp has a new kind of bulb, and usually, these things bother them somewhat too, because they don’t like change and like routine.

ISTJ Secrets 4: They like Appropriateness

The ISTJ is not necessarily an old-timer, but they are secretly inclined towards appropriateness.

They lay a great deal of premium in good manners and showing respect to others.

However, the ISTJ realizes when someone is being phony and they hate that, they need things to be honest and authentic and they cannot stand it when people are overly-emotive for no good reason.

The ISTJ has a great sense of decorum and they usually do everything they can to maintain it, but at the same time, they can be relaxed about things as long as they know that the people they are with are honest and real, and the situation can be relaxed and casual.

The ISTJ also won’t care for social niceties or emotional expressions when they are intended to gain something in return, and they won’t stand for fake flattery and respect either, which makes them very fair employers and supervisors.

ISTJ Secrets 5: They are Funny

The biggest and least-known ISTJ secret is that they can be very funny and hilarious, it is just that their brand of humor is not recognized all that well./

The ISTJ may notice funny details and relationships and they may have a largely nternal, dry sense of humor. 

They may also be very sarcastic and don’t usually share this with others unless they know them well, and some of the quips they have about situations may just remain in their head.

ISTJ Famous People and Celebrities

Here is a list of some famous ISTJ people and celebrities:

  • Queen Elizabeth II
  • Warren Buffet
  • Geroge Washington
  • Harry Truman
  • George W Bush
  • Evander Holyfield
  • Herbert Hoover
  • Andrew Jackson
  • Queen Rania of Jordan.
  • Frederick the Great
  • Arthur, Duke of Wellington,
  • Rosalynn Carter
  • Mitt Romney
  • Condoleezza Rice
  • Henry Ford
  • Jeff Bezos
  • John D. Rockefeller
  • Malcolm McDowell
  • Jack Webbngvar Kamprad
  • Peter Thiel
  • Elizabeth Holmes
  • Robert De Niro
  • Julia Roberts
  • Gary Sinise
  • John Malkovich
  • Jean-Claude Van Damme
  • Christopher Lee
  • Denzel Washington
  • Natalie Portman
  • Anthony Hopkins
  • Kirk Douglas
  • Johnny Carson

ISTJ Weaknesses

The ISTJ is a logistician, which means that they are very good at logical thinking and analysis and usually make for successful people, but the ISTJ weaknesses can sometimes be their downfall and cause mental health issues or interpersonal problems.

Some common ISTJ weaknesses are as follows:

  • The ISTJ can be Stubborn and they may often tend to resist any new idea or change in their environment. They need things to stay the say and they seriously believe that they have seen more of the world and therefore are better able to decide what is best.
  • The ISTJ can also be somewhat callous or insensitive, and this may not mean that they are trying to be harsh or mean, they just truly believe that honesty is the best policy. The ISTJ may not always take emotions into consideration, which may hurt the more sensitive people.
  • The ISTJ always has to follow rules and this can make them somewhat routine and mundane, and they may not look at any new ways to do things even if a new approach is required in the situation.  This may also mean that they may find themselves lost for what to do when there are no set rules and regulations in place, which is a massive weakness.
  • The ISTJ also tends to be somewhat Judgmental and may be highly unlikely to respect people who disagree with their version of facts or information as they see it, and their bluntness means they won’t hide this discontent either.
  • The ISTJ may also feel grave responsibility towards everything, which may mean that they may blame themselves for even some things that are not their fault, and they may internalize a lot of guilt for what is wrong in their environment. The ISTJ may also not express this blam and guilt they feel, which makes it that much harder to help them out.
  • The ISTJs biggest weakness is simply their inability to express emotions, and they may sometimes go so far in not expressing things that even when they should share, they may not, and this can cause big problems if they are suffering from depression or stress, both of which are very likely such a high-functioning individual.

If you’re facing this, it may be a good idea to seek the help of a therapist or other mental health professional. You can find a therapist at BetterHelp who can help you learn how to cope and address it.


In this brief guide, we looked at 5 ISTJ secrets that will help you know an ISTJ better, and we will also look at some other things like ISTJ famous people and celebrities, and ISTJ weaknesses. Please feel free to reach out to us with any questions or comments you may have.

Frequently Asked Questions (FAQs): ISTJ Secrets 

What does Istj hate?

Here are some things that the ISTJ hates:

When someone does a sloppy job
Entertaining impractical ideas
Lack of clear structure.
Dealing with too much emotion
Not getting enough alone time
Someone breaking rules or rebellion
When people don’t keep promises or their word

Are Istj females rare?

No, ISTJ females are not rare.

Compared to most personality types, ISTJ females are more common than other introverted personality types.

Is Istj rare?

No, the ISTJ is not rare, in fact, they are considered to be some of the most common introverted personalities in the Myers-Briggs personality types.

The ISTJ is said to make up about 13 percent of the population, which not only shows that they are not very rare but also how much these traits make the society run smoothly.





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