ISTJ enters from order and pushes through. ISTP enters from bodily comfort and cuts by practical matters. Things, systems, the site. Interests overlap, and ISTJ's "the rules" and ISTP's "the easy way" point in different directions on the same site.
ISTJ's "logic that builds order" and ISTP's "sensing that arranges comfort" are elements of the same kind, with extraverted and introverted reversed. The same with the second positions, "force that pushes through" and "practical logic". What sits above the other's consciousness sits below yours. So the other's advice can be used, yet you cannot learn from them. You understand the circuit of thought, and it does not become yours.
In the old observations, quasi-identity is "coexistence in complete mutual incomprehension". No threat is felt. No sense of equality either. The areas of interest tend to coincide; the approach differs at the root.
The irrational side yields first, and the rational side accepts it.
Disproportion
ISTJ waits for the emotion that moves the room; ISTP waits for the ethics of people. Both are the other's sore spot, and in trouble no support comes.
What you want and where it hurts cross over. ISTJ's fourth, "ethics of people", is what ISTP wants most; ISTP's fourth, "emotion that moves the room", is what ISTJ wants most. So you cannot help each other. And yet you do not deeply wound each other either. The other's sore spot is a place you cannot touch either.
One looks less capable overall, yet produces better results in the very area where you struggle. Both feel it as unjust, and self-respect suffers. Two logical types, so it continues calmly even so.
How each sees the other
ISTJ → ISTP
Sure hands.
They do not keep the rules.
They ask you for the ethics of people.
ISTP → ISTJ
They build systems.
They do not accept the easy way.
They ask you for feeling.
What has been recorded
SCENE 01An unjust disproportion
A partner who seems below you overall produces better results only in the place where you are weak. Both feel it as unjust and self-respect suffers. The irrational side yields first, and the rational side accepts it, the record says.
SCENE 02Coexistence on parallel lines
The vulnerable and suggestive places hardly overlap, so there is no deep wounding. You coexist calmly on parallel lines. But long in a closed small group you exhaust rapidly, and the discomfort of "understanding without being able to imitate" piles up, the record says.
SCENE 03Advice usable, learning impossible
Talking about the same book, it sounds as if you had read different ones. The other's advice can be used, but you cannot learn from them. The circuit the other uses as a matter of course is foreign to you: Augustinavičiūtė's description.
Love, living together, work, family: scene by scene
ConversationShort. Calm.
RomanceNeither wounding nor supporting each other.
Living togetherYou tire in a closed place.
WorkIf the site and the management are divided.
FamilyCalm, on parallel lines.
If you keep going
Do not call the disproportion unjust
Both self-respects suffer.
Do not say rules or the easy way
The difference in approaches.
Have feeling and ethics outside
Each other's sore spots.
For these two
How to meet ── In front of people
A relation that sees different views in the same words. Meetings, parties, places with an audience. A good pair in public, so meeting there leaves a good impression.
Approach ── Do not hurry the conclusion
The talk fits. The conclusion does not. Do not try to change theirs; stop at "so that's how you see it". Enjoy the same book as a different book.
A date ── Somewhere crowded
A festival, a market, a big exhibition. Walking side by side among people is easier for these two than long hours alone.
Gifts ── for ISTJ, A new idea; for ISTP, Something new and interesting
For ISTJ: A book in a genre ISTJ would not choose, a first experience. Something that opens possibilities. For ISTP: A tool ISTP does not know, a first genre. Something that opens possibilities.
PROne thing for this relation
A relation that sees different views in the same words, so tools to set the views side by side.
Podcast equipmentThe conversation of these two comes alive when others listen.
Frequently asked
My partner gets better results at what they should not be able to do
The disproportion wounds self-respect, the observation says.
Calm, yet distant
Coexistence on parallel lines, the record says.
My partner yields first
The irrational side yields first, the observation says.
What is ISTJ and ISTP compatibility in love?
Neither wounding nor supporting each other. More under "Love, living together, work, family: scene by scene" and "If you keep going".
Do ISTJ and ISTP work well together?
If the site and the management are divided. More under "Love, living together, work, family: scene by scene" and "If you keep going".
This pair is the quasi-identity relation, one of the sixteen. How the relation itself arises, and how to tell it from the others, is on the relation page.
The two Model A's: what talks to what
ISTJ on the left, ISTP on the right. Each shows where the eight elements sit; lines connect the same element. Where each line starts and ends decides what happens in this relation.
Lines connect the same element in the other person's structure. 1–2 (strong) 3 (role) 4 (vulnerable) 5–6 (wanted) 7–8 (capable, indifferent)
1 → 8TiISTJ's 1 (leading) Ti (introverted logic) sits in ISTP's position 8 (demonstrative). ISTP can do what ISTJ is good at but does not value it. ISTJ feels slightly unappreciated.
2 → 7SeISTJ's 2 (creative) Se (extraverted sensing) sits in ISTP's position 7 (ignoring). ISTP can do what ISTJ is good at but does not value it. ISTJ feels slightly unappreciated.
3 → 6FiISTJ's 3 (role) Fi (introverted ethics) sits in ISTP's position 6 (mobilizing). ISTJ is weak here and ISTP wants it. A gap neither can fill.
4 → 5NeISTJ's 4 (vulnerable) Ne (extraverted intuition) sits in ISTP's position 5 (suggestive). ISTJ is weak here and ISTP wants it. A gap neither can fill.
5 → 4FeISTJ's 5 (suggestive) Fe (extraverted ethics) sits in ISTP's position 4 (vulnerable). What ISTJ asks for is ISTP's weakest point. The more ISTJ asks, the smaller ISTP gets.
6 → 3NiISTJ's 6 (mobilizing) Ni (introverted intuition) sits in ISTP's position 3 (role). What ISTJ asks for is ISTP's weakest point. The more ISTJ asks, the smaller ISTP gets.
7 → 2TeISTJ's 7 (ignoring) Te (extraverted logic) sits in ISTP's position 2 (creative). ISTP's main field is one ISTJ does not care about. Little friction, little interest.
8 → 1SiISTJ's 8 (demonstrative) Si (introverted sensing) sits in ISTP's position 1 (leading). ISTP's main field is one ISTJ does not care about. Little friction, little interest.