It's one of the most basic and (I think) important elements of communication. If you listen closely to somebody, try to relate and empathize, and keep an open mental and emotional attitude, the other person is more likely to feel like you hear them and far more likely to hear you, too. If you don't, people can always tell and things can go badly. But the thing is, as others have said, everybody is different, so you need to see and hear what's the same as you about this person and what's different -- and talk to all of that. So, every different situation and every different person is going to mean another test and it's important to pay attention to the details so you can figure out how to hear and be heard.