Is it our minds? Cause it’s definitely not our bodies… is it our “soul?” Whatever that means… the experiences you have through life build you, but don’t define you. (The illusion that your experience defines you, is a lack of will and outlook.)
Is much easier to convince yourself you’ll fail, than it is to pick yourself up. But never forget- your perception is yours and yours alone. If you have a negative outlook destroy it and create a better one.
Never get frustrated and quit, just get more determined to kick-ass! You got this.