From the book Simple Secrets for Becoming Healthy, Wealthy & Wise, by David Niven:
'In almost everything that happens, you will have the opportunity to consider the worst or the best implications. Even in terrible setbacks, there are rays of hope you might focus on. And even in wonderful events, there are threads of worry or despair you might cling to. Your focus is not merely a personality quirk, but a way of life. Not only will learning to see the upside, the optimistic outcome, the good in what has happened increase your enjoyment of life; it will lengthen your life.
...a positive mind-set goes hand in hand with good health....
Optimistic people, who credit themselves when things go well and view bad times as temporary, live longer than pessimists. According to a study conducted over a thirty-year span, pessimistic people are 19 percent less likely to reach a normal life expectancy.'