Don't Meddle With My Mettle

It's not often I see either meddle or mettle in a manuscript, although I sometimes do see the occasional medal.

Mettle is defined as the courage to go on.  It often gets tested in battle.

Meddle is what your best friend does when she tries to fix you up on a blind date.  Or, you can also think of the most popular verison of meddling:

{I just had a flashback to when my son was younger and could watch Scooby Doo all day (and all night!)}

So, when in doubt, ask yourself: is my character engaging in Scooby Doo and the gang behavior by meddling in something?  Or is my character filled with determination and courage to continue her quest?