Annie Lamott

Bird by Bird / Chapter four:
I think that something similar happens with our psychic muscles. They cramp around our wounds—the pain from our childhood, the losses and disappointments of adulthood, the humiliations suffered in both—to keep us from getting hurt in the same place again, to keep foreign substances out. So those wounds never have a chance to heal. Perfectionism is one way our muscles cramp. In some cases  we don't even know that the wounds and the cramping are there, but both limit us. They keep us moving and writing in tight, worried ways. They keep us standing back or backing away from life, keep us from experiencing life in a naked and immediate way. 
"Observe Everything. Always think for yourself. Never let other people make important decisions for you." — from Bad News by Edward St. Aubyn