The shift from *wanting* to *being excited* matters because desire can mislead us—we often want what we think we should want, what looks respectable, what solved someone else's problem. Excitement, by contrast, is harder to fake; it's the body's vote before the mind gets involved. A person might want a promotion at work because it checks boxes, but if the actual day-to-day tasks don't spark anything, that wanting will curdle into resentment within months. The best decisions tend to come when both the wanting and the excitement align, but when they conflict, Ferriss is arguing—quite rightly—to trust the more honest signal.