Stress makes your white blood cells older, says a new study from the University of California, which makes you older, which makes you die.

"A merry heart doeth good like a medicine: but a broken spirit drieth the bones," says King Solomon.

"In your life expect some trouble
But when you worry
You make it double
Don't worry, be happy... ," says Bobby McFerrin

When authorities like these dovetail, we are inclined to believe it.