We need that certain dose of fearlessness to push the limit, and to move the goal post just a little higher, and higher.

We take comfort in not doing our best.
We take comfort in being lazy, not giving it all, and not getting the most out of a given situation. We give ourselves that little excuse of consolation, to entertain the disappointment. That wasn't my best. I could've done better, had I given it my biggest effort.
A little part of us is scared of knowing what would've been the result, had we given it all. A little part of us is, always, scared of seeing what would've been the most of us.

What if we've given our best, and there's nothing more we can do, and still the result lets us down?
We take comfort of never, never knowing it.