Years ago, my dad helped Carson, my twelve-year-old brother, prepare for an overnight camping trip. “Son, now that your backpack is full, try it on and make sure you can manage the weight. It’s really heavy. You don’t need all these campfire pots and cans of food.” “Oh, I can handle it, Dad. No problem. I’ve been swimming all summer, and I’m really strong. Will you put it on my back now?” “Okay, but remember you’ll have to hike through the woods to the campsite.” Carson slipped his arms through the straps. We watched as he rocked onto his toes…