Another call to extend our field of vision

Most people limit themselves to focusing on their own happiness, or on the happiness of their immediate friends or family, doing very little to help those whom they don't know to live happier lives. While not necessarily a bad thing, per se, this type of limited focus, is, to a large extent, responsible for the sad state of the world today. If I know for a fact that someone leads a self-centered life, I cannot take any advice that that person gives about life seriously. And when that person claims to see things "clearly", I realize that what the person sees clearly is his/her limited field of vision.