Do you need a carrot to keep motivated?
Our test driving Subarus was to learn some stuff as well as serve as D's carrot to keep himself excited about extra contract work. Any extra monies he makes will go towards travel and saving for a car he really really wants.
It was useful exercise as he found out he couldn't fit into one of the cars he liked. No use pining after something that doesn't actually work. It's a good metaphor for life. Gets you out of your head.
So on the same line, do you put mental and emotional limits on your life? Are you stronger than you think?
Being tested highlights my limits. Otherwise the roll of daily life doesn't usually get me out on enough of an edge (either way) to remind myself of my limitations.
I guess that is why some people work with mediation to test their mental and physical stillness. Why some people do extreme sports, to see just how far they can go. Why some people fast just to be able to feel and overcome the fear of hunger.
I know people who engage in all of the above activities and they tell me they feel the most alive when in that zone. The most in tune with the essence of who they are. And by doing so increases their capacity of what they can handle.