I don't pretend to deeply understand how all the cognitive functions work yet. I haven't spent enough time reading up. However, I know that, as an INFJ, I use Ni quite a bit and that it has something to do with taking information from many sources and using it to come to new conclusions creating aha! moments at times. My most recent aha! moment was coming to terms with the fact that I've been an enabler. It has the potential to completely change my life. Please share your most recent aha! moment.