People
Whatever it takes for you to believe that you're better than good enough to achieve your dreams is what you must do. And remember, your greatness is not tied to any outcome. It is found in the valiance of the attempt.
— David Goggins

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker urges doing whatever is necessary to believe you are more than good enough for your goals. The speaker adds that worth does not hinge on results. What makes a person great is the courage of the attempt itself, whether or not it succeeds.
Context reviewed