People
When anyone tells me I can’t do anything, I’m just not listening anymore.
— Florence Griffith-Joyner

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
When told she can't do something, she simply stops hearing it. The speaker describes tuning out doubters as a habit, so naysaying has no effect on what she decides to attempt. It's a confident statement about filtering out other people's limits.
Context reviewed