The fact that Jobs came back and took Apple to new heights makes him a fascinating study in power. I take three lessons away from it. The first is the most inspiring: it's that power can result from sheer drive, persistence, resilience, and the ability to tolerate conflict. Does anyone remember the first mobile device, the Newton? It was a big failure. For that matter, how did the Lisa, another nonstarter, get resurrected as the Macintosh? Jobs persisted, sticking with his same focus on the user interface, his fundamental vision of ease of use and cool design, but also learned from the setbacks. Note that when he left Apple he was a rich man — he'd been wealthy by most people's definition of wealth for decades. But he didn't retire to the beach or even to the world of nonprofits. He founded NeXT Computer. Then, with the sale of it to Apple, he returned to unseat Gil Amelio, the National Semiconductor veteran who had taken the helm at Apple. Forget all that and just look at how he has kept going through his health crises; this is a man who is hard to slow down.