The energy we bring to our work sets the type of work we do. Oftentimes when people say, "I'm burnt out" what they're really saying is that they have lost the fire for their work. When they say "I feel like I'm stressed out" or "on the verge of a breakdown" they're saying that they've lost their path, their purpose. Perseverance without purpose or passion is not grit, it's a grind.