the best way I can explain it is internal feeling that can best be sensed when it eminates out of the person "riled up", but "riled up" is more about overflowing. An Fi user who has learned that The best way to manage Fi is through Fe actions will focus on Fe actions, but this is not Fe. You cant possibly define things this way. I will do Fe actions because it pulls Fi out of people. My focus is not on the action, but the person. Defining this by an action confuses things. Yes I will/can pull out negative Fi, but I dont like to so its not my strong point. Some people need to have negative Fi pulled out though and this will not come across as harmonious.
Also where people get confused is places where protean said that they stick with comfort, this is where Fe has problems with pulling out Fi vs Fe action. They try to balance but err on the side of comfort in this manner. But dont think that they err on the side of comfort for everything...they are still J and they still have that drive that pushes them outside of that comfort in a different way.