The ISTJ and Tertiary Introverted Feeling: How it Works (and Doesn’t)
ISTJs get a lot of labels. Responsible. Logical. The person who probably laminated their tax documents. And while all of that is (mostly) true, there’s a hidden layer to them that doesn’t get talked about enough—their tertiary function: Introverted Feeling (Fi). Now, Fi is a weird one for ISTJs. It’s deeply personal, deeply emotional, and…

