When you fear that the worst will happen, your own thoughts may help to bring it about. Someone once wrote, "Fear is the wrong use of imagination. It is anticipating the worst, not the best that can happen."

A salesman, driving on a lonely country road one dark and rainy night, had a flat. He opened the trunk--no lug wrench. The light from a farmhouse could be seen dimly up the road. He set out on foot through the driving rain. Surely the farmer would have a lug wrench he could borrow, he thought. Of c…