Here's an interesting article.
Please Don't Have a Nice Day
I'm kind of relieved that I'm not alone in thinking about pain,suffering and depression as probably a push - sometimes they are just the push ,a knock on the head - absolutely required for human race.I've learnt certain lessons only because of good solid knock on my head and melancholy and frustrations. Infact I have learnt nothing from happy moments - not even gratitude ! Gratitude i learnt from bad times and remembering to be grateful always is still a task !
"Human resilience is really quite astonishing. People are not the fragile flowers that a century of psychologists have made us out to be. People who suffer real tragedy and trauma typically recover more quickly than they expect to and often return to their original level of happiness, or something close to it. That's the good news—we are a hardy species, even though we don't know this about ourselves. The bad news is that the good things that happen to us don't feel as good or last as long as we think they will. So all that wonderful stuff we're aiming for—winning the lottery, getting promoted, whatever we think will change our lives—probably won't do it after all. We're resilient in both directions. We rebound from distress but we also rebound from joy."
-Daniel Gilbert from Stumbling on Happiness