When we are tired, it is often because we are bored. When no real challenge faces us, a mental and physical lethargy sets in. “Sometimes death only comes from a lack of energy,” Napoleon once said, and lack of energy comes from a lack of challenges, comes when we have taken on less than we are capable of. Take a risk and your body and mind will respond with a rush of energy. Make risk a constant practice; never let yourself settle down. Soon living on death ground will become a kind of addiction—you won’t be able to do without it. When soldiers survive a brush with death, they often feel an
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