It’s Not Them. It’s You. – The Sales Blog

Achieving the outcome you need by persisting is a critical attribute for people who succeed. But doing so without changing your approach isn’t.
You provide a stimulus. You receive a response. That response is feedback. When what you are doing fails, try again. But also try something different.

You produce the results you want when you recognize that the only thing you have any power to change is you. Change your beliefs. Change your actions. Change your results.