Jewish Music Prager's Official Web Site Part five - Practical suggestions to being good From lectures by Dennis Prager at the University of Judaism. Order his series How to be Good from DP's office.
Happy people are more enjoyable to be around.
Also, unhappy people do much evil. It's not evil to be unhappy, but being miserable predisposes one to spend less time thinking about others. Those who make up revolutionary movements like Communism or Nazism disproportionately come from among the unhappy. They believe themselves to be victims and therefore feel free of moral regulations. Prager says that every survey shows that persons are more likely to be nice to the attractive.