I believe courageous people know how to set boundaries with their work. Their self-esteem is not so wrapped up in the number of hours they work or their job title, but rather in their balance of family, friends, personal endeavors (physical, artistic, or intellectual activities that fill up one's soul), and work. This has recently become more clear to me as I navigated some changes in my career.
Consciously leaving the office after nine hours most days is hard, because I get engaged in what I am doing. Work is a fun, complex game, and I love games. But I need to remember to spend time away. Even though I love it, the intensity has burnt me out when I don't stay aware of myself and others in my life, regulating my time and energy.