ISFJs often mistype as INFJs Almost every type has another type (or two) which it will gravitate toward mistaking for itself. This is particularly common when the auxiliary or dominant function is shared. (To learn about functions, read: The Eight Cognitive Functions .) In the case of ISFJs and INFJs, the auxiliary (Fe) is shared – giving both types a strong humanistic interest. Both types can make excellent counselors, advisors, human resource personnel, and social activists. And both types approach these pursuits with a reflective, introspective angle – not simply imbuing a career or project with energy, but with wisdom too. As an INFJ myself, when I was new to typology, I mistook many ISFJs I encountered for being INFJs like myself because we got along so well and shared so much in common. When I sit down with an ISFJ one-on-one, I’m almost always guaranteed to have an enriching conversation full of fascinating gossip. Yes, gossip. This may sound like an odd, trivial tangent, ...