There was some research done a while back looking at doing things to make yourself happy vs. doing things to serve a greater purpose. They looked at physiological measures of stress. You can guess which activities actually produced lower stress. In modern times, there has been a tendency for folks to advocate for striving for personal happiness without any greater purpose. I am glad that it makes me happy to do things that I believe will leave the world, and the land that in my charge, better than I found them. I know many of the folks here feel the same way.