"When you're singing, you're using extra muscles, and it requires a lot of exercise and breathing. You can't do that if you're a sissy. If I have any fitness advice for people, I'd tell them to sing more. It's good therapy, too."

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In the army we are drilled into execution and then supervision, to make sure everything goes the way you planned it. But there is another thing that we do in the military, that I think perhaps isn't done enough in corporate life: As soon as you have made that decision, you start on the contingency planning. Because there is, as we like to say, a thinking, breathing enemy out there, who is not going to let you do just what you want.

— Colin Powell