It is very easy in the world to live by the opinion of the world. It is very easy in solitude to be self-centered. But the finished man is he who in the midst of the crowd keeps with perfect sweetness the independence of solitude.
Ralph Waldo Emerson
SELF-ESTEEM controls PERFORMANCE/REALITY which stimulate SELF-TALK which reinforces SELF-ESTEEM. This cycle can work positively or negatively and is greatly influenced by the self-talk (I knew I wasn't good at -X vs. next time I'll practice and do better at -X).