Researchers tested newly married couples' reactions to stress. An optimistic perspective increased mental health for low-stress situations, but the more stressful the situation, the less optimism helped. The moral:
By all means, be optimistic and when life gives you lemons, make lemonade. But when the sh*t hits the fan, keep a cool head. It’s doing you no good to imagine rose petals are hitting your face.
The Dish 