Yes. It certainly helps. If you look at things negatively, you can gain more stress. More stress means more health problems and more difficulty in getting everything done and more interuptions in sleep.
I learned at an early age that listening to others and trying to understand what is going on around me is very important. Now, I have a depth of perspective that usually surprises people. I've found the greatest key to knowing people is simply to listen.
If you are truly listening, your view of the world is expanded by every new person in your life. Everyone has something of value to share. Even people you may think are stupid, have some perspective, some idea, some knowledge that you do not. Many people who are horribly disabled, and could by all rights be angry, are the most at peace. It's all about how you view life.