“During the war, our military leaders planned for the morrow, but they could not afford to have any anxiety. "I have supplied the best men with the best equipment we have," said Admiral Ernest J. King, who directed the United States Navy, "and have given them what seems to be the wisest mission. That is all I can do."
"If a ship has been sunk," Admiral King went on, "I can't bring it up. If it is going to be sunk, I can't stop it. I can use my time much better working on tomorrow's problem than by fretting about yesterday's. Besides, if I let those things get me, I wouldn't last long."
Whether in war or peace, the chief difference between good thinking and bad thinking is this:
Good thinking deals with causes and effects and leads to logical, constructive planning;
Bad thinking frequently leads to tension and nervous breakdowns andfretting about past.