Is a phrase used on many a self-development type course, I've probably used it myself a few times. It is over used and misunderstood, associated with achieving the impossible an almost ideology rather than practical guidance. Tina Turner, explains things so much more eloquently than this phrase could ever do.
"Sometimes you've got to let everything go - purge yourself. If you are unhappy with anything... whatever is bringing you down, get rid of it. Because you'll find that when you're free, your true creativity, your true self comes out."
If you know anything about Tina Turner's life and her abusive relationship, this becomes so much more real. That's the thing when we talk about unlocking true potential, what we really mean is shed all the stuff in our lives that holds us back. I can't remember anyone saying to me carrying that bad stuff makes me a better person and that inflicting suffering on ones self is a good thing. From someone who did carry that stuff around, it certainly wasn't pleasurable and it never once helped me. There's the challenge how do you do that, shed stuff to, "free creativity and your true self". The bible gives real practical guidance;
Repent, then turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord.(Acts 3:19)
With the promise of God's Grace, a sense of being released and a freedom through Jesus Christ, that's without self-imposed limits because our Lord defines them; He knows us and created us.