Fitzgerald captures something most self-help wisdom misses: persistence alone can become a slow march toward exhaustion, a tightening grip on yesterday's plans. True vitality requires the harder thing—the capacity to release what isn't working and begin anew, which demands more courage than simply grinding forward. A person might persist in a failing marriage or dead-end career for decades and call it strength, when real strength would be the clarity to recognize when to lay down one burden and pick up another. That willingness to restart, rather than merely endure, is what separates the living from the merely functional.