The optimists believe defeat is just a temporary setback. - Martin E P Seligman

Pessimistic labels lead to passivity, whereas optimistic ones lead to attempts to change.

I used to think that the topic of positive psychology was happiness, that the gold standard for measuring happiness was life satisfaction, and that the goal of positive psychology was to increase life satisfaction. I now think that the topic of positive psychology is well-being, that the gold standard for measuring well-being is flourishing, and that the goal of positive psychology is to increase flourishing. This theory, which I call well-being theory, is very different from authentic happiness theory, and the difference requires explanation.

Curing the negatives does not produce the positives.