The real wisdom here isn't about ambition—it's about refusing the comfort of certainty. "Hungry" we understand, but "foolish" is the dangerous part: Jobs is asking us to hold contradictory truths at once, to ask questions a sensible person would consider settled. A musician who's been playing for twenty years might suddenly decide to learn an entirely new instrument, looking foolish to colleagues who've already mastered their domain, yet that willingness to be the ignorant student again is what keeps the work alive. It's the opposite of the expertise trap, where knowing too much becomes a prison.