Comment by bpang

One more note: Working for a larger purpose creates happiness and meaning. This is why volunteer activities, caring for your family and friends, supporting a charity, or working to live up to your moral principals all feel so good. Ultimately, we all seek a continuing experience. We thrive on feeling that we matter, and that what we do matters. We also experience meaning when we have a sense of "congruence and coherence" between who we are and what we do.