Many "big figures" in their low periods often don't appear to be engaging in "hard work" in the traditional sense, but rather seem to be in a state of long-term dormancy. In fact, they are not "not working," but are protecting their "cognitive bandwidth." Because once someone is trapped in long-term high-pressure repetitive work; they quickly regress into "only solving immediate problems"; and their brain loses the ability to perceive long-term structures. True major achievements are often not built through physical effort alone, but through: judging trends; observing human nature; understanding the situation; accumulating cognition over the long term; and waiting for the right moment. So many people, in hindsight, realize that the most frightening part of basic physical exhaustion is not just fatigue. It is that it gradually erodes a person's thinking ability, imagination, patience, and ambition.