As an fe, I solely judge my actions and reasons on my own belief system. I pay attention to those around me and the actions and feelings of others (being fe of course), but the main reason I'm warm and treat people the way I do is because it's the RIGHT thing to do. Not the "nice" thing. But by "right thing" I don't mean what's right in the eyes of others or by the given law, but what's seen as right in my own personal belief system. Me and 2 other INFJ's I know truly have a high regard for justice and 'doing the right thing' (whatever that may be to those certain INFJ's) but we might see justice in more obscure ways than others.
In other words, we in a way make up our own sense of justice.