We manipulate our memories to brace for future hardships

Jeff Galak, a Carnegie Mellon behavioral 
sci­entist who worked on the study, suggests that 
we remember hardships as worse than they actually 
were so that when we face those experiences 
again, they will be less painful than we expect. 
Galak thinks that by understanding this “bracing” 
strategy individuals can learn to overcome it and 
stop fearing exaggerated pain. He acknowledges 
that doing so may backfire, however­it is 
possible, he says, that by bracing for the worst, we actually suffer less.

http://www.scientificamerican.com/article.cfm?id=the-power-of-negative-thinking 



"People Who experience mood swings, fear, voices and visions"