An ability to recover from or adjust easily to misfortune or change
An attribute that will allow you the opportunity to overcome the challenges that will undoubtedly present themselves in your life.
How do you prepare for the unknown?
When was the last time you were physically uncomfortable, and had to perform a physical responsibility?
Now I'm not advocating unsafe activities or the like.
What I am advocating is stretching your physical and mental comfort zones. Giving yourself the opportunity to grow in confidence in your innate abilities to overcome difficult and challenging situations.