From morning to late afternoon I watched a caterpillar climb a tall pine tree, climb without ever stopping to rest. That was September, two years ago, in the beautiful northern woods of Door County, Wisconsin. This tiny creature spent the entire day climbing, up and up the tall rugged trunk, over hill and dale, then out along a high branch, never resting. He seemed to be feeling some urgency, I thought; who knows? I've not been a caterpillar. He was certainly determined. When he stopped, I thought he must be exhausted, and then he began to spin. Surely, he felt he was about to fall apart; how could he not?

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