When The "One Thing" Is The WRONG Thing

We get the same message again and again.  Know your "one thing".  Focus, and stay focused.  Be determined.  When everyone else makes 10 calls, make 20.  Stay the course.  Commit fully and never give up. But surely, there has to come a time when you question whether your "one thing" is the right thing?  Being persistent and taking strong consistent action is great - but what if you're pushing hard in the WRONG direction?  Just HOW persistent do you have to be before you finally wash your hands and walk away?  Here are my thoughts.  As always, I'd love to hear yours too.